Free printable English worksheet on subordinating conjunctions for language learning.

Let’s go through each sentence one by one and pick the best subordinating conjunction from the list:
after, although, because, before, if, since, unless, until, when, while

---

1) I will go to the park ___ it stops raining.
→ We wait for rain to stop → “until” fits best.
✔ *I will go to the park until it stops raining.* — Wait, that doesn’t make sense. Actually, we go AFTER it stops. So maybe “when”? But “when” is more general. Let’s think: “I will go to the park when it stops raining.” That works. Or “after”. Both are okay, but “when” is simpler and commonly used.
Actually, looking again — “until” means you wait up to that point. So “I will go to the park when it stops raining” is better.
But let’s check the options — “when” is in the list.
✔ Best fit: when

Wait — actually, re-reading: “I will go to the park ___ it stops raining.”
If I say “until”, it would mean I’m waiting at the park until it stops — which isn’t logical.
So “when” or “after” both work. But “when” is more natural here.
✔ Final choice: when

---

2) Sarah likes to read books ___ she has free time.
→ She reads during free time → “when” or “if”?
“when” implies every time she has free time → makes sense.
“if” implies condition — also possible, but “when” is more natural for habitual actions.
✔ Best fit: when

---

3) We went to the beach ___ it was sunny.
→ Reason: because it was sunny → “because” fits perfectly.
✔ Best fit: because

---

4) Tom cannot play outside ___ he finishes his homework.
→ He can’t play UNTIL he finishes → “until” is correct.
✔ Best fit: until

---

5) Maria will call you ___ she arrives at the station.
→ She calls at the moment she arrives → “when”
✔ Best fit: when

---

6) Peter likes to play basketball ___ his friends come over.
→ He plays WHEN his friends come → “when”
Could be “if”, but “when” suggests it happens regularly.
✔ Best fit: when

---

7) The cat will stay indoors ___ it’s too cold outside.
→ Condition: IF it’s too cold → “if”
Also “unless” could work? “The cat will stay indoors unless it’s too cold” — that would mean it goes out if it’s cold — opposite meaning.
So “if” is correct: The cat stays inside IF it’s cold.
✔ Best fit: if

---

8) Sally will go for a walk ___ the rain stops.
→ Same as #1 — she waits until rain stops → “when” or “after”
“when” is smoother.
✔ Best fit: when

---

9) I will study hard ___ I want to pass.
→ Reason: because I want to pass → “because”
✔ Best fit: because

---

10) David will not go to the movies ___ he has a test.
→ Condition: IF he has a test → “if”
Also “unless” could work? “David will not go unless he has a test” — that would mean he ONLY goes if he has a test — opposite.
So “if” is correct: He won’t go IF he has a test.
✔ Best fit: if

---

Wait — let’s double-check #1, #8 — maybe “until” is intended?
Original sentence: “I will go to the park ___ it stops raining.”
If we use “until”: “I will go to the park until it stops raining” — that means I’m already at the park and I stay there until rain stops — which doesn’t make sense with “will go”.
So “when” is definitely better.

Same for #8: “Sally will go for a walk when the rain stops.”

Now, let’s look back at the word bank:
after, although, because, before, if, since, unless, until, when, while

We didn’t use: although, before, since, unless, while — that’s fine, not all need to be used.

But wait — #4: “Tom cannot play outside ___ he finishes his homework.”
We said “until” — yes, that’s perfect.

#7: “The cat will stay indoors ___ it’s too cold outside.”
We said “if” — yes.

But what about #10? “David will not go to the movies ___ he has a test.”
We said “if” — yes.

Is there any that might be “unless”?
For example, if it were: “David will go to the movies unless he has a test” — then “unless” fits. But here it’s “will NOT go... unless” — that changes meaning.

So our answers seem solid.

Let’s write them clearly:

1) when
2) when
3) because
4) until
5) when
6) when
7) if
8) when
9) because
10) if

Wait — #2: “Sarah likes to read books ___ she has free time.”
Could it be “when” or “if”?
In context, it’s likely describing a habit — so “when” is better.
Similarly, #6: “Peter likes to play basketball ___ his friends come over.” — again, habitual → “when”

All good.

Final Answer:

1) when
2) when
3) because
4) until
5) when
6) when
7) if
8) when
9) because
10) if

But let’s check if any should be “since” or “after”.

#3: “We went to the beach ___ it was sunny.” — “because” is best. “Since” could also mean “because”, but “because” is clearer for cause.

#9: “I will study hard ___ I want to pass.” — “because” is direct reason.

No issues.

One more: #1 — could it be “after”?
“I will go to the park after it stops raining.” — also correct.
But “when” is more immediate and common in such sentences.
Since both are acceptable, but “when” is listed and fits well, we’ll keep “when”.

Actually, looking at standard grammar exercises, “when” is often preferred for time-based conditions like this.

Okay, confident now.

Final Answer:
1) when
2) when
3) because
4) until
5) when
6) when
7) if
8) when
9) because
10) if