Understanding the Progressive Aspect

How is the progressive aspect of a verb generally formed?

• By adding "-ed" to the verb.

• By using the verb "to be" followed by the "-ing" form of the main verb.

• By using the verb "to have" followed by the past participle.

• By simply using the base form of the verb.

What does the progressive aspect of a verb indicate?

• A completed action.

• A habitual action.

• An ongoing action.

• A future intention.

Which of the following sentences uses the past progressive aspect?

• I walk.

• I will walk.

• I was walking.

• I walked.

Which of the following sentences uses the future progressive aspect?

• I walk.

• I will be walking.

• I walked.

• I am walking.

When forming the progressive aspect, which part of the verb phrase changes to indicate the tense (past, present, future)?

• The "-ing" form of the main verb.

• The subject of the sentence.

• The verb "to be".

• The object of the sentence.