past tense of the verb to leave?
467223
left\n\nExamples:\n\nI will leave. or I am leaving. -> I left.  or  I have left.\n\nWill he leave? -> Has he left?
205918
Most verbs can be followed only by an infinite with "to" or an infinitive without "to."  So, you can say "I can go," but not "I can to go."  "Help," however, can be followed by either one.  It is correct to say "helped to harmonize" or "helped harmonize."  It is totally up to you and is a style choice.  If you want to make it consistent and cut words, using "helped harmonize" would be fine.
749758
you can go to http://grammar.uoregon.edu/verbs/transitive.html\nand http://grammar.uoregon.edu/verbs/intransitive.html to have a look.
896065
It depends if it is past tense or present tense.  It "drove" you crazy (happened yesterday)  or it "drives" you crazy (happening right now).  Also, for past tense, "this WAS one of those ....."
858313
To be is an auxiliary verb in the present progressive tense- example I am shopping, we are watching, she is listening.\n\nHave is an auxiliary verb in the present perfect- example She has done her work, They have seen the show. \n\nI discard the kiss if you are a guy. If you are a girl, I'll take the kiss.\n\nKitty is what we call in this country- a dumbass. It wasn't a yes or no question, Kitty.
946160
There is no verb form. You have to use it with the verb to be. To be pedantic. Or to be a pedant
869861
Yeah, its chose, like " I chose to go home the other day".\n\nLots of things in the English language don't look right so don't worry about it much.
592479
Langugages in which  tense is not expressed anywhere in the verb or any auxiliaries -- mostly in "analytic" (also called "isolating") languages which use a particle of adverb of time (when needed), e.g., by adding "yesterday" or "tomorrow".\nhttp://en.wikipedia.org/wiki/Grammatical_tense\nhttp://en.wikipedia.org/wiki/Isolating_language\n\nMost prominent exanple: Chinese\nhttp://www.chinese-outpost.com/language/grammar/verbal-aspect-expressing-tense-in-mandarin-grammar.asp\n\nOther examples: Thai,  Vietnamese\nhttp://en.wikipedia.org/wiki/Thai_language#Verbs\nhttp://en.wikipedia.org/wiki/Vietnamese_language#Tense
1069887
In English grammar, only verbs (one of the parts of speech) can have the various tenses. So this question is referring to the use of various verb forms in sentences.\n\nFor my illustration, let me use two very simple verbs - cook;  see\n    Present            : cook;          see\n    Past                 : cooked;      saw\n    Future              : will cook;     will see\n    Past participle   : cooked;      seen\n\nPast tense is one of three of the simple tenses, which are present tense, past tense and future tense. The past tense form is used to describe something that happened in the past, e.g.\n   a) She cooked dinner for everyone.  (cooked)\n   b) I saw him just now.                      (saw)\n\nPast participle form of the verb is used when making sentences using the perfect tenses (present perfect tense, past perfect tense, future perfect tense), e.g.\n   a) She has cooked for everyone.\n   b) She had cooked dinner by the time we arrived.\n   c) She will have cooked dinner by this time tomorrow.\n\n   a) She has seen the movie many times.\n   b) She had seen him taking the money.\n   c) She will have seen everything by now.\n\nI hope you notice when using past participle, you MUST use what is called 'helpers', the little words that make the sentence grammatically correct - has, have, had, will have\n\nI realise these days many people do not use properly constructed sentences. I have tried to make my explanation as simple as possible, and I really hope this helps. I take my leave with this very simple example of a commonly made mistake:\n   a) I seen her already.  (wrong)\n   b) I have seen her already.  (correct)
524839
You need only a noun and a verb:\n\nHe ran.
667732
In the kind of situations that you have highlighted, the sentence, which would sound much more appropriate than others, would be "Future Indefinite" as the time factor can't be determined definitely and the process is neither continuous nor perfect. According to the rules of the tense, the correct option in the given example would be "What time will your plane leave?".
511831
That is a correct present perfect progressive passive sentence construction, except you would need to keep the "on", not put it in parenthesis. However, it is a very awkward sentence. Passive voice is best avoided unless you have no choice because you don't know the agent of the verb, or because you are trying to make a point. Passive voice becomes even more convoluted in the progressive (continuous) tenses. There are other ways of expressing the same thing. \n\nThe point is, though, you did construct a proper sentence.\n \nPresent perfect = have/has + past participle of the next verb. \nProgressive/continuous = form of "be" + present (-ing) participle of the next verb. \nPassive voice = form of "be" + past participle of the next verb. \nPut that together and you get Have + past participle of be/been + present participle of be/being + past participle of cheat/cheated. (Present perfect progressive passive voice)\n\nHave been being cheated.
50643
"ing" is continuous. The past participle describes the first of two actions in the past.\nExample: I went to bed at 11 o'clock. You called me at 11.15.\nWhen you called me I HAD already GONE to bed.
394511
The past participle of jump is jumped.\n\nMaybe you would die if you jumped, but if you do jump, I couldn't let you do it knowing your grammar was incorrect.\n\nGood luck.\n\nYou crazy, cheeky wee person.
334418
Tense\n\nI will go feed the ducks is a future tense\n\nI am going to go feed the ducks is a present tense.
651475
movie titles or verbs dealing with making a movie?\n\nOK...as in "cut" (stop filming/acting) or as in the title "Go"??
975252
Take the base verb, also known as present tense, and add ING.  List the helping verbs that must be used for the different tenses.\nPresent Progressive:  I am walking; You are walking; he/she/it is walking.  Present Progressive uses the helping verbs AM, IS, and ARE.\nPast Progressive: I was walking; You were walking; He/she/it was walking.  Past Progressive uses the helping verbs WAS and WERE.\nFuture Progressive: I shall/will be walking; You shall/will be walking; He/she/it shall be walking.  Future Progressive uses the helping verbs SHALL or WILL.\nPresent Perfect Progressive:  I have been walking; You have been walking; He/she/it has been walking.  Present Perfect Progressive uses the helping verbs HAVE BEEN and HAS BEEN.\nPast Perfect Progressive:  I had been walking; You had been walking; He/she/it had been walking.  Past Perfect Progressive uses the helping verb HAD BEEN.   \nFuture Perfect Progressive: I shall have been/will have been walking; You shall have been/will have been walking; He/she/it shall have been/will have been walking.  Future Perfect Progressive uses the helping verbs SHALL HAVE/WILL HAVE.\n\nProgressive Tenses use the helping verbs of TO BE.  If you look at future tense, present perfect, past perfect, and future perfect, you will see that all you need to do is add BEEN to the other helping verbs.