Prepositions and Conjunctions — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. We stayed indoors because it was storming heavily.
Because introduces a clause that explains why something else happens.
2. Although the sky was cloudy, we went hiking anyway.
Although shows a fact that contrasts with the main clause action.
3. Call your parents when you arrive at camp.
When shows the time relationship between two events in a sentence.
4. If you finish homework, you may play outside.
If introduces a condition needed before the main action can occur.
5. The dog barks when strangers approach the gate.
When shows the moment that triggers the action in the main clause.
6. She studies hard because she wants strong grades.
Because explains the cause behind the action in the main clause.
7. If it snows tonight, school may be canceled.
If shows a possible event that controls the next action.
8. We won the game although our captain was injured.
Although signals a contrast between an obstacle and the actual result.
9. Eat a snack if you feel hungry before lunch.
If marks the condition that must be true before the action.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
because
→ cause or reason
cause or reason
although
→ contrast despite fact
contrast despite fact
when
→ time of event
time of event
if
→ condition must hold
condition must hold
Subordinating conjunctions tag a clause as cause, contrast, time, or condition.