UNIT 1 - SKILLFUL 3 - Connecting Past Actions with Conjunctions

Which sentence uses "before" correctly?

• I decided to go traveling before I left school.

• Before I leave school, I want to travel.

• I will travel before I leave school.

Answer explanation

The correct choice is "I decided to go traveling before I left school." because it uses "before" to indicate an action (traveling) that occurred prior to another action (leaving school) in the past.

Choose the correct sentence with "after":

• After I left school, I decided I wanted to travel.

• After I leave school, I will travel.

• I have traveled after I left school.

Answer explanation

The correct sentence is 'After I left school, I decided I wanted to travel.' It uses the past tense 'left' to indicate a completed action before the decision to travel, making it grammatically correct.

Which sentence shows that one action happened immediately after another?

• While I was studying, my roommate took a nap.

• As soon as the class began, I realized I'd chosen the wrong course.

• Since I started college, I have learned many new ideas.

Answer explanation

The sentence 'As soon as the class began, I realized I'd chosen the wrong course.' clearly indicates that one action (realizing) occurred immediately after another (the class beginning), making it the correct choice.

Choose the correct sentence with "since":

• Since I started college, I have learned many new ideas.

• I learned many ideas since I started college.

• I have learned many new ideas since I start college.

Answer explanation

The correct sentence is 'Since I started college, I have learned many new ideas.' It uses the past tense 'started' correctly with 'since' to indicate a time reference, while the other options contain grammatical errors.

Which sentence uses "until" correctly?

• I waited with her until the bus arrives.

• I waited with her until the bus arrived.

• I will wait with her until the bus arrives.

Answer explanation

The correct sentence is "I waited with her until the bus arrived." because it uses the past tense "arrived" to match the past tense "waited." The other options incorrectly mix tenses.

Which sentence uses "while" correctly?

• While I was studying, my roommate took a nap.

• I studied while my roommate took a nap.

• My roommate was taking a nap while I studied.

Answer explanation

The sentence 'While I was studying, my roommate took a nap.' correctly uses 'while' to indicate that both actions occurred simultaneously, making it the best choice among the options.

Which sentence shows an action that happened before another action?

• After I finished my homework, I went to bed.

• I will go to bed after I finish my homework.

• I went to bed before I finished my homework.

Answer explanation

The sentence "After I finished my homework, I went to bed" clearly indicates that finishing homework occurred before going to bed, making it the correct choice for an action that happened prior to another.

Choose the correct sentence with "since":

• Since I moved here, I have made new friends.

• I have made new friends since I moved here.

• I made new friends since I moved here.

Answer explanation

The correct sentence is 'Since I moved here, I have made new friends.' It properly uses 'since' to indicate the starting point of an action that continues to the present, making it grammatically correct.

Which sentence uses "as soon as" correctly?

• As soon as I finished my meal, I went for a walk.

• I went for a walk as soon as I finish my meal.

• As soon as I go for a walk, I will finish my meal.

Answer explanation

The correct sentence is 'As soon as I finished my meal, I went for a walk.' because it uses the past tense 'finished' to indicate that the meal was completed before going for a walk.

Which sentence uses "while" correctly to show two actions happening at the same time?

• While I was waiting for the bus, I saw a friend.

• I saw a friend while I was waiting for the bus.

• I waited for the bus while I saw a friend.

Answer explanation

The correct choice, 'While I was waiting for the bus, I saw a friend,' properly uses 'while' to indicate that both actions occurred simultaneously. The other options do not convey this meaning as clearly.