Repaso de InglésOnline version Helping verbs by Mary Carmen Arana 1 PRESENT form of HAVE a has, have b had 2 BE ABLE TO and its PAST TENSE a should b can, could 3 state of being verb with past participle and gerund a be, been, being b am, is, are 4 shows an obligation or necessity a must b could 5 to say that something is possible or likely or to ask or give permission a may, might b colud 6 shows that something is going to take place in the future and its past form a will, would b went, was 7 present and past form of BE a am, is, are, was, were b has, have 8 past tense and past participle of HAVE a had b should 9 shows an obligation or gives and advice a must b should 10 simple form, present of go a go / goes b went 11 simple form, past of go a go / goes b went 12 simple form, future of go a go / goes b wiil go 13 Continuios forms, past of go a was/were going b am/is/are going 14 Continuios forms, present of go a was/were going b am, is, are going 15 Perfect forms, present of go a have/has gone b had gone 16 Perfect forms, past of go a have/has gone b had gone 17 Perfect Continous forms, past of go a had been gone b has/have been gone 18 Perfect Continous forms, present of go a have/has been gone b had been gone
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