By Past perfect, helping verbs

Lyangsuan wrote:When do we use "had" instead of "have"?Is the verb behind "had" a past tense or present tense?Example. Teenager who had finished their secondary education.Teenager who have finished their secondary education.Teenager who had finish their secondary education.Which one is correct?...

Bamtori wrote:Thanks for your reply, Marius. With "last night" it is definately "had". Then how about leave out "last night" in the sentence. Which should I use, "we (have/had) some guys come in here and ransack the place."?When will this ransacking take place? Will it be in the future? From...

Have and has are helping verbs that form the present perfect tense. Look at these: I have finished the report. He has called her many times to pick up the report. You have drawn a clear diagram. Had is used as a helping verb to form the past perfect tense: He had eaten three hotdogs before...

Pemmican wrote:As far as I know, there are these 13 tenses: a) Past Perfect Progressive ........................had been + present participle b) Past Perfect ..........................................had + past participle c) Past Progressive ...................................was/were + present...

As far as I know, there are these 13 tenses: a) Past Perfect Progressive ........................had been + present participle b) Past Perfect ..........................................had + past participle c) Past Progressive ...................................was/were + present participle d)...