英语语法时态do not get off the bus until it( has stopped)和It is t

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英语语法时态
do not get off the bus until it( has stopped)和It is the second time that we (have gone )to...为什么要用括号里的时态

第一个句子,是强调车从“行驶”到“停下”的全过程,只有完成时才能表示这种过程,意思是“直到车完全停下来,才能下车”.这里不可能用一般过去时,因为主句是一般现在时,不可能“过去车停了,现在才能下车”.
第二个句子,你就记住凡是在It is the first/second/third time that .句型中,后面的从句一定要用现在完成时.如果是 It was the first/second/third time that.句型中,后面的从句一定能要用过去完成时.

英语语法时态do not get off the bus until it( has stopped)和It is t Don't get off the bus until it ____ .A.has stopped B.stopped 英语语法Don't get off the bus until it _____A,stop B,stopped C,w Don't get off the bus until it has stopped.为什么until后面用完成时不是 Do not get off the bus until it stops.改错 not until 的时态问题Don't get off the bus until it __(stop)该填什么时态把Don't get off the bus until it had stopped.翻译成中文 Don't get off the bus until it ____ A.stopped B. Never get off the bus __________ it has stopped. don't get on the bus ()it has stopped A until B unless Don't get lrr the bus until it has stopped的意思 Don't get off the bus ___ it has stopped 单项选择

英语语法 时态do not get off the bus until it( has stopped)和It is t

英语语法时态do not get off the bus until it( has stopped)和It is t