Was or Were Worksheets for 4th Grade - Your Home Teacher - Free Printable

Let’s solve this step by step.

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Part 1: Write the plural (if needed) of these words

We need to know how each word changes when we make it plural. Some words are irregular — they don’t just add “s” or “es”.

1. thesis → This is a Greek/Latin word. Plural is theses
2. cirrus → Also from Latin. Plural is cirri
3. fish → Can be fish (same as singular) or fishes (if talking about different types). For Grade 4, usually fish is accepted unless specified. But since the instruction says “if needed”, and fish can stay same, we’ll write fish (but note: sometimes teachers expect “fishes” for variety — however, standard answer here is often fish)
→ Actually, let’s check common usage in school worksheets: most accept fish as both singular and plural. So we’ll go with fish.
4. step-uncle → Compound word. Only the main noun gets pluralized? Wait — actually, “step-uncle” means uncle by marriage. The plural is step-uncles (add ‘s’ at end)
5. observatory → Ends in ‘y’, but preceded by vowel ‘o’? No — ‘v’ before ‘y’. Rule: if consonant + y, change y to i and add es. So: observatories
6. loaf → Irregular. Plural is loaves
7. syllabus → Latin origin. Plural is syllabi (also acceptable: syllabuses, but syllabi is more traditional)
8. spotlight → Regular noun. Add ‘s’: spotlights
9. agenda → From Latin. Originally plural of “agendum”, but now used as singular. Its plural is agendas (common modern usage) OR agenda can be treated as collective. But for Grade 4, likely expecting agendas
→ Actually, many sources say “agenda” is already plural in Latin, but in English, we treat it as singular and make plural “agendas”. Let’s go with agendas
10. most → This is tricky. “Most” is not typically made plural because it’s an adjective or adverb meaning “the greatest amount/number”. It doesn’t have a plural form. So: no plural needed → leave blank or write “N/A”? But instruction says “write the plural (if needed)” — so if no plural exists, maybe skip? But worksheet has line — perhaps write “most” again? Or indicate not applicable?

Wait — let’s double-check:

Actually, “most” as a noun (meaning majority) can be used in plural? Not really. Example: “The most of them” — still uses “most”. So probably, no plural form — but since the worksheet expects something, and other words have plurals, maybe it’s a trick? Alternatively, perhaps it’s a typo? But let’s assume it’s testing knowledge that some words don’t change.

In many such worksheets, for words like “sheep”, “deer”, “fish”, they accept same form. For “most”, it’s not a countable noun usually. So best answer: most (unchanged) — but that might confuse.

Alternatively, perhaps it’s meant to be “moose”? But it says “most”.

Looking up: “most” does not have a standard plural. So we’ll write: most (no change) — but since the instruction says “plural (if needed)”, and it’s not needed, we can write the same word? Or leave blank? The worksheet has a line — so probably write the word as is if no plural.

But let’s see common practice: In similar exercises, for uncountable or invariant nouns, they write the same word.

So for #10: most

BUT — wait! Maybe it’s a mistake? Another thought: “most” could be confused with “moss”? Moss → mosses. But it says “most”.

I think we should go with: most (no plural form) — so write “most” on the line? Or perhaps the teacher expects nothing? Since the instruction says “write the plural (if needed)”, if not needed, maybe leave blank? But that might lose marks.

To be safe, let’s check online resources or standard answers.

Upon second thought: In many Grade 4 worksheets, for words like “sheep”, they write “sheep” again. For “fish”, “fish”. For “most”, since it’s not a typical noun, perhaps it’s included to test if student knows it doesn’t change. So I’ll put most.

But let’s list all:

1. thesis → theses
2. cirrus → cirri
3. fish → fish
4. step-uncle → step-uncles
5. observatory → observatories
6. loaf → loaves
7. syllabus → syllabi
8. spotlight → spotlights
9. agenda → agendas
10. most → most (no change)

However, for #9 “agenda”: Some argue that “agenda” is already plural (from Latin agendum), so its singular is “agendum”, but in modern English, “agenda” is used as singular, and plural is “agendas”. For Grade 4, “agendas” is fine.

For #7 “syllabus”: Both “syllabi” and “syllabuses” are correct, but “syllabi” is preferred in academic contexts. For Grade 4, either might be accepted, but let’s use “syllabi”.

Now Part 2: Sort words into Singular or Plural

List of words:

tax, atlases, kiss, life, poppies, leaves, stitch, arch, wharf, faxes, emphases, babies, churches, motto, flushes, brushes

We need to identify which are singular and which are plural.

Recall:

- Singular: one item
- Plural: more than one, often ends in s, es, ies, etc., but some irregular.

Go one by one:

- tax → singular (plural: taxes)
- atlases → plural (singular: atlas)
- kiss → singular (plural: kisses)
- life → singular (plural: lives)
- poppies → plural (singular: poppy)
- leaves → plural (singular: leaf)
- stitch → singular (plural: stitches)
- arch → singular (plural: arches)
- wharf → singular (plural: wharves or wharfs — but “wharf” is singular)
- faxes → plural (singular: fax)
- emphases → plural (singular: emphasis)
- babies → plural (singular: baby)
- churches → plural (singular: church)
- motto → singular (plural: mottos or mottoes)
- flushes → plural (singular: flush)
- brushes → plural (singular: brush)

So:

Singular: tax, kiss, life, stitch, arch, wharf, motto

Plural: atlases, poppies, leaves, faxes, emphases, babies, churches, flushes, brushes

Count: 7 singular, 9 plural — total 16 words, matches.

Now, write final answer.

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Final Answer:

Part 1: Plurals

1. theses
2. cirri
3. fish
4. step-uncles
5. observatories
6. loaves
7. syllabi
8. spotlights
9. agendas
10. most

*(Note: For #10, "most" does not have a standard plural form; it remains unchanged.)*

Part 2: Sorting

Singular:
tax, kiss, life, stitch, arch, wharf, motto

Plural:
atlases, poppies, leaves, faxes, emphases, babies, churches, flushes, brushes