was+v-ing;were+v-ing 6、现在完成时:has/have+v-过去分词 7、一般将来时:will+verb 三、助动词 1、现在时中:do,does 2、一般过去时:did 3、完成时中:done 四、情态动词 can,must,need,will,should,had better记住接原形就可以啦！四兄弟中，重点关注老二实义动词！他人数众多，变化千变万化，穿越过去...
been being 2) verb to have: have has had 3) verb to do (dummy): do does did 4) modal verbs: can could must shall should will would may might *(ought to used to)参考: learnenglish.de/grammar/verbaux
Have, has, had Modal auxiliary verbs never change form. These include the following: May, might, must Shall, should Can, could Will, would Ought to Examples of Helping and Auxiliary Verbs in Sentences Shehadfoundthe solution to the locked safe; unfortunately, we couldn’t getpast the alarms...
and future perfect tense. These tenses are pretty cool, I guess, but I'm not sure that I'd call themperfect. Whoever named these guys sure thought highly of them. At any rate, all of these perfect tenses are formed with thehelping verbshave, has, had, willandshalland thepast participl...
were, been, being, have, has, had, could, should, would, may, might, must, shall, can, will, do, did, does, havingWhen we put one or more helping/auxiliary verb with a main verb, we get what is called a verb phrase.
3.现在完成时 have/has done (1)描述到现在为止已经完成的动作或状态。 (2)描述动作发生在过去,但强调对现在造成影响。 (3)在时间、条件状语从句中,表示将来某时将已经完成的动作。 (4)在“It’s the first time that sb. have/has done…”这一句型中,从句须用现在完成时,译为“这是某人第一次做某事...
The team has been practicing nonstop for the tournament. Future tenses Simple future Use the simple future for actions that have not happened yet but will later. To form the simple future, just place the modal verb will before the root form of the main verb. (Note that if the action ...
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have/hashave/has+done+beendoing hadbeenhaddone+doing will/shallwill/shallhavehave+donebeen+doingwould/shouldwould/should过去+dohave+donewould/shouldwould/should将来be+doinghavebeen+done 最常用的几种时态与时间状语的搭配一般现在现在进行现在完成一般过去过去完成一般将来 最常用的几种时态与时间状语的搭配 ...