TENSE PRESENT AUXILIARIES VERB FORMS TIME EXPRESSION simple form or simple form+s every day, on Mondays, etc. simple do-does progressive am-is-are verb+ ing perfect have-has past participle perfect prog. have-has been verb+ing now several times, for…, since…. for...,since... EXAMPLE I eat grapes. Mary eats grapes. I’m eating grapes. I’ve eaten grapes. I’ve been eating grapes. PAST simple did progressive was-were perfect had perfect prog. had been verb+ed or irregular verb+ ing past participle verb+ ing yesterday, last..(Wednesday, month, year, etc) before he came I worked. I ate grapes. I was eating grapes. I had eaten grapes. for 15 minutes when he came I had been eating grapes. next.... I will eat grapes. I will be eating grapes. I will have eaten grapes. I will have been eating grapes. I’m going to eat grapes. when he came FUTURE simple will progressive will be perfect will have perfect prog. will have been idiomatic am-is-are going to simple verb+ ing past participle when they come verb+ ing by the time he comes for 15 minutes by the time they come simple as soon as he comes