last month可以当现在完成时的时间状语吗

last month可以当现在完成时的时间状语吗 for last month与since last month,哪个是对的?时态是现在完成时 He left school last month(改为现在完成时）He left school last month.(改为现在完成时) He__ __ __from school for one month. 一道关于现在完成时和现在完成进行时的英语题目Since last Augues,the old lady has had bad headaches three to four times a month.中的'has had'能不能用'has been having'代替? the three of us_____ around europe for about a month last summerA,travelledB,have travelledC,had travelledD,travel到底是用过去时还是现在完成时?选哪一个? 现在完成时传练,按括号给的正确形式填空.When__________you__________(buy)the car?---I__________(buy)it last month.She__________just__________(meet)her teacher.__________Tom__________(go)to London last Friday.---Yes,he__________._______ I have been busy yesterday afternoon为什么要用have been busy而不用have busy主要想问的是什么时候现在完成时里动词前要用been,也就是have been ...例如还有 ：She has been sick since last month. The police __ for the thief for two years and finally he __ last month.请问这道题的第一个空用现在完成时还是用过去完成时?为什么?The police __ for the thief for two years and finally he __ last month.A:has searched; was caugh Is this the museum( )they visited last month?是不是用that和which都可以的饿? 英语翻译last month. last month 中文? 填适当的介词 I was ______ vacation last month . last month （　　）忙的 for them填空 英语 Where did they go last month?的答句 ..the last few days 现在完成时的时态吗?last day 不是过去时的么 着两个什么有区别呃 为什么表示不同的时态 i do homework last day的一般过去时,现在完成时,过去完成时,一般进行时,过去进行时,一般将来时过去将来时, 造句.1.一般过去时.（teach sb.to do sth.last year）2.一般将来时.（meet some friends next month）3.现在完成时.（visit the museum three times ） 不是应该用过去完成时吗?since last August ,the old lady _____(have) bad headaches three to four times a month是用过去完成时还是用现在完成时？、