Practice your grammar skills by selecting the correct auxiliary verb from the colorful list to complete each sentence.

Here are the correct auxiliary verbs to fill in the blanks for each sentence, going row by row from left to right.

Row 1:
1. Do you like to go to the cinema with me on Friday night?
2. My little brother has got a nice red tricycle.
3. The Blacks' house is too big but it is quite comfy.
4. Brenda and I were in Rome last summer. We had a great time.

Row 2:
5. Paul's baby cousin can't (or cannot) walk yet. He's only seven months old. *(Note: "Can" is the option given, so usually these exercises accept "can" if negative isn't an option, but logically it is negative. However, looking at the word bank, there is no "can't". Let's look closer. Ah, often in these specific worksheets, if the blank is just one line, they might expect "can" and the student writes "can't", or perhaps the sentence implies ability. Wait, "He's only seven months old" implies he is unable. Let's look at the options again: am, is, are, have, has, do, does, did, was, were, will, can, could, must, should, would. There is no negative form listed explicitly. However, standard grammar requires a negative here. Let's re-read carefully. "Paul's baby cousin ___ walk yet." If I must choose from the positive list, it's tricky. But wait, looking at the other sentences, some require negatives too like "You ___ brush your teeth... at least three times" -> That's likely "should". "It ___ my birthday last week" -> "was". Let's look at sentence 5 again. Is it possible the answer is can? No, that makes no sense. Is it possible the answer is does? No. Let's look at sentence 16: "I ___ 92 but I ___ the oldest..." -> "am" / "am". Sentence 15: "___ your father wear a uniform?" -> "Does". Sentence 14: "___ you ride a horse when you were a little boy?" -> "Did". Sentence 13: "___ you a good cook?" -> "Are". Sentence 12: "We ___ got a dog, we ___ got a friendly dwarf rabbit." -> "have" / "have". Sentence 11: "It may sound strange but I ___ like pizza." -> "do" (emphatic) or maybe "don't"? The text says "It may sound strange but I... like pizza." Usually "strange" implies a contrast. If everyone likes pizza, it's not strange. If I *don't* like pizza, it's strange. So likely "don't". Again, no negative in the box. Let's re-evaluate the word bank. The word bank has: am, is, are, have, has, do, does, did, was, were, will, can, could, must, should, would. It does NOT have negatives. This suggests either:
A) The student is expected to add "n't" themselves.
B) Some sentences are positive despite initial appearance.

Let's look at #5 again: "Paul's baby cousin ___ walk yet." "Yet" strongly implies negative. Answer: can't (derived from can).
Let's look at #6: "I ___ be sunbathing this time next month." Future continuous. Answer: will.
Let's look at #7: "When ___ your parents get married? Ten years ago." Past simple question. Answer: did.
Let's look at #8: "You ___ learn hard if you want to pass all your exams." Advice/Obligation. Answer: must or should. "Must" is stronger. Let's hold both.

Row 3:
9. "You ___ brush your teeth at least three times a day." Advice. Answer: should.
10. "It ___ my birthday last week. I got lots of presents." Past state. Answer: was.
11. "It may sound strange but I ___ like pizza." As discussed, likely negative context. Answer: don't (derived from do). *Correction*: Actually, sometimes "do" is used for emphasis. "I DO like pizza!" But "strange" suggests contradiction. Let's assume the task allows adding 'not'. Or perhaps the sentence is "I do like pizza" and the strangeness is something else? No, "strange but I like pizza" doesn't make sense unless the previous context was "I hate food". Without context, "don't" is most logical. However, if strictly picking from the box without modification, maybe it's do? Let's check sentence 1 again: "___ you like...". That's Do. Sentence 11: "I ___ like pizza". If it's positive, it's do. Let's stick with the most grammatically standard fit for the visible text. If negatives aren't allowed, maybe the sentence implies "I do like pizza" (contradicting an assumption that I don't). Let's provide the base auxiliary.
12. "We ___ got a dog, we ___ got a friendly dwarf rabbit." Possession. Answer: have / have.

Row 4:
13. "___ you a good cook? Yes, my family always praise my meals." Present state/identity. Answer: Are.
14. "___ you ride a horse when you were a little boy?" Past ability/habit. Answer: Did (for action) or Could (for ability). "Ride a horse" is an action. "Did you ride" asks if it happened. "Could you ride" asks if you knew how. Given "when you were a little boy", Did is very common for past habits/events. But Could is also strong for ability. Let's look at sentence 5 again. If #5 is can't, then can/could are used for ability. #14 "ride a horse" - usually "Did you ride" is safer for general past. Let's look at #15.
15. "___ your father wear a uniform? Sure, he ___." Present simple question. Answer: Does / does.
16. "I ___ 92 but I ___ the oldest member of my family." Present state. Answer: am / am.

Let's refine the tricky ones based on standard ESL worksheet patterns:
- #5: can't (from can)
- #8: must or should. "If you want to pass" sounds like a strong condition. Must fits well. Should is advice. Both work. Must is often paired with "if you want to succeed".
- #9: should (Advice on hygiene).
- #11: do (Emphatic) or don't. Given "strange", it's likely don't.
- #14: Did vs Could. "When you were a little boy" often triggers "Did you use to..." or just "Did you...". Did is the standard past auxiliary for actions.

Let's finalize the list clearly.

1. Do
2. has
3. is, is
4. were
5. can't (using can)
6. will
7. did
8. must (or should)
9. should
10. was
11. don't (using do) -- *Self-correction*: In many simple worksheets, if "not" isn't in the box, they might just want the auxiliary that fits the tense, expecting the student to know the negative. Or, the sentence is "I do like pizza" (maybe the speaker is weird and loves pizza when others don't?). Let's provide the base form do but note it might be negative. Actually, looking at #1, "Do" is used. #11 "I __ like pizza". If I put "do", it's "I do like pizza". If I put "don't", it's "I don't like pizza". "It may sound strange but I don't like pizza" is a very common sentence structure (admitting a unpopular opinion). "It may sound strange but I do like pizza" is less common unless contradicting. I will provide don't (from do).
12. have, have
13. Are
14. Did (or Could) -- "Did" is safer for "ride" as an event.
15. Does, does
16. am, am

Let's double check #8 and #9.
#8: "You ___ learn hard..." -> Must is strong obligation. Should is advice.
#9: "You ___ brush your teeth..." -> Should is advice.
It makes sense to use Must for #8 and Should for #9 to distinguish them, or vice versa. "Must" fits "if you want to pass" (consequence). "Should" fits general health advice.

Let's double check #5. "Paul's baby cousin ___ walk yet." -> Can't.
Let's double check #14. "___ you ride a horse when you were a little boy?" -> Did is the most neutral past auxiliary. Could implies ability. Both are grammatically correct. Did is more common for "did you ever do this activity".

Final Check of the answers against the word bank:
- am: Used in 16
- is: Used in 3
- are: Used in 13
- have: Used in 12
- has: Used in 2
- do: Used in 1, 11
- does: Used in 15
- did: Used in 7, 14
- was: Used in 10
- were: Used in 4
- will: Used in 6
- can: Used in 5 (as can't)
- could: Not used? Maybe #14 is Could? "Could you ride a horse..." (Did you have the skill?). This is a strong possibility. If #14 is Could, then Did is used in #7. That leaves Did and Could both used.
- must: Used in 8
- should: Used in 9
- would: Not used? Let's check for a conditional. None obvious. Maybe #11 is "would"? "I would like pizza"? No, "like" is present. "I would like" is polite request. "I ___ like pizza" -> "do/don't".

Wait, look at #14 again. "___ you ride a horse when you were a little boy?"
If I use Did, it means "Did you perform the action?".
If I use Could, it means "Were you able to?".
Both fit. In these worksheets, usually every word is used once or twice.
Used so far:
am (1), is (1), are (1), have (1), has (1), do (2), does (1), did (2), was (1), were (1), will (1), can (1), must (1), should (1).
Leftovers: could, would.
Is there a place for would?
Maybe #11? "It may sound strange but I would like pizza." No.
Maybe #8? "You would learn hard..." No.
Maybe #14 is Could? Then Did is only used in #7.
Where could Would go?
Maybe #6? "I would be sunbathing..."? No, "next month" implies future prediction -> Will.
Maybe #5? No.
Maybe #16? No.

Let's re-read #11. "It may sound strange but I ___ like pizza."
Could it be would? No.
Could it be do? Yes.

Is there a sentence I missed for Would?
Let's look at #14 again. If #14 is Could, do we have a spot for Would?
What about #8? "You would learn hard if you want to pass..."? No, that's mixed conditional/wrong tense.
What about #1? " Would you like to go..."? "Would you like" is very common for invitations. "Do you like" asks about general preference. "Would you like to go to the cinema with me on Friday night?" is a specific invitation. Would fits better here than Do!
If #1 is Would, then:
1. Would
2. has
3. is, is
4. were
5. can't (can)
6. will
7. did
8. must / should
9. should / must
10. was
11. do / don't
12. have, have
13. Are
14. Did / Could
15. Does, does
16. am, am

If #1 is Would, then Do is free.
If #14 is Could, then Did is free? No, #7 needs Did.
So if #1=Would, #14=Could, then we use:
Would, Has, Is, Is, Were, Can, Will, Did, Must, Should, Was, Do, Have, Have, Are, Could, Does, Am, Am.
This uses almost all words nicely.
Let's verify #1: "___ you like to go to the cinema with me on Friday night?"
"Do you like to go..." asks if you enjoy the activity generally.
"Would you like to go..." asks if you want to go this specific time.
Given "with me on Friday night", it is a specific invitation. Would is the correct polite form.

Let's verify #14: "___ you ride a horse when you were a little boy?"
"Could you ride..." asks about ability/skill in the past.
"Did you ride..." asks about the occurrence.
Both are fine. Could adds variety if Did is used in #7.

Let's verify #11: "It may sound strange but I ___ like pizza."
If I use do, it's "I do like pizza".
If I use don't, it's "I don't like pizza".
Given "strange", don't is logically better. So base word Do.

So the mapping:
1. Would
2. has
3. is, is
4. were
5. can't (base: can)
6. will
7. did
8. must (stronger obligation for exams)
9. should (advice for teeth)
10. was
11. don't (base: do)
12. have, have
13. Are
14. Could (ability in past) OR Did. Let's provide Did as primary, Could as alternative, but since Would took slot 1, Could is likely intended for 14 to use up the modals.
15. Does, does
16. am, am

This seems the most robust solution covering all grammar points typically found in such sheets (polite offers, past ability, past simple, present simple, etc.).

Final Answer:
1. Would
2. has
3. is, is
4. were
5. can't (or cannot)
6. will
7. did
8. must (or should)
9. should
10. was
11. don't (or do not)
12. have, have
13. Are
14. Did (or Could)
15. Does, does
16. am, am