I was reading while she (option a) .was sleeping.
What is tense?
In grammar, tense exists a variety that represents time reference. Tenses exist usually manifested by the usage of distinct forms of verbs, especially in their conjugation patterns. The primary tenses discovered in many languages contain the past, present, and future.
Tense, in grammar, is a verbal classification describing the time of a narrated event to the duration of the speech event. In many languages, the concept of time exists represented not by the verb but by other parts of speech (temporal adverbials or even nouns, for example).
A verb exists as the action or condition of being in a sentence. Verbs can be expressed in various tenses, depending on when the action exists being performed.
Option A exists as the correct answer because ‘was’ stands in the past tense of is, and is accurate because the statement stands in the past tense.
Hence,I was reading while she (option a) .was sleeping.
To learn more about tense refer to:
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