Different helping verbs are used for different purposes in sentences. One of their main functions is to situate the action of a sentence in a particular aspect of time. The two main aspects that helping verbs play a role in are the progressive aspect and the perfect aspect.<span>
I hope this helps</span>
Answer:
sparknotes and shmoop can
trust me
they help me pass english
Explanation:
The dependent clause is typically in the past too. If not, this is called a tense shift and it should be avoided unless necessary.