Final answer:
The aspects of the verb phrases in the sentences are: a. past continuous, b. past perfect, and c. present perfect, each expressing actions in different time frames and states of completion.
Step-by-step explanation:
Understanding Verb Aspects
To determine the aspect of the verb phrase in the given sentences, we must look at how the action is being expressed in terms of its completion or duration.
- a. She was preparing for an exam. - This sentence uses the past continuous aspect, which shows an action that was occurring over a period of time in the past.
- b. Had you done your homework? - This sentence uses the past perfect aspect, indicating an action that was completed before another action or time in the past.
- c. The janitor has waxed the floor. - This sentence uses the present perfect aspect, indicating an action that has been completed at some point before now, but is relevant to the present.
Remember that the aspect of a verb phrase helps us understand the time frame and continuity of the action.