Help with Grammar? I need the main verbs, helping verbs, and the tense of these three sentences. Before the sun came up that day, tens of...

The main verb is the action that is done by the subject. The
helping verbs are used along with the main verbs to clarify tense. In the sentences above the
correct answers are as follows:

subject -- sun -- main
verb -- came (past tense)

subject -- tens of
thousands -- helping verbs -- had, been -- main verb
-- killed (past perfect tense)

Main
verb -- is -- subject-- North Anatolian Fault (present
tense)

subject -- scientists -- helping verb -- have
-- main verb -- found (present perfect) (This verb
construction is repeated later in the same sentence.)

To explain
your errors: in the first sentence, the word "sleeping" is not a verb because the subject of the
sentence isn't doing the sleeping. It is a verbal that is being used as an adjective to describe
which people were killed. The word "before" is never a verb because you can't do it. You can't
say: I am going to before today. The word before is used as a subordinating conjunction to
introduce a dependent clause. That entire clause is telling when something
happened, so it is providing adverb information to the sentence as a
whole.

In the second sentence, the only verb is "is." "Similar" is
an adjective, not a verb. You can't similar. The verb "is" expresses a state of being, and this
sentence is talking about the state of being of a fault.

In the
third sentence you missed the helping verb "have." You labled the main verb
correctly.