Past perfect tense.
the verb is threw. Threw is the past tense of throw.So the tense of this sentence is past to be exact past simple
Studied is the past tense of the verb study.
This type of verb phrase is called going to future.It has the form be + going to + verb.It can be used to talk about future intentions(as in your sentence).
It is a present tense irregular verb. BUT the sentence is a past simple sentence the didn't (did not) tells us the sentence is past.
The present progressive tense of the verb "to type" is "typing." So, the sentence would be: He is typing two pages per hour.
Helped is an action verb and is in the past tense in this sentence.
The basic sentence is - Mrs Weera stopped her - this is a past simple sentence. There is only one verb - stopped - and this is in the past tense.
3 type of tense
future perfect (passive voice)
Will type.
Were. The subject of this sentence is plural (we) so the verb should be a plural verb, also the other verb (knew) is past tense. The past plural form of are is were. -- We knew we were in trouble.