神马作文网My bother came back while I_____homework.A.am doing B.was do
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My bother came back while I_____homework.A.am doing B.was doing C.do .D,did(选什么并给予详细回答）
B was doing
当你兄弟回来时是过去式,所以后面形容我在做作业时也是过去时,因为是while 表明是与你弟弟回来同时发生的事情,所以是进行时,加起来就是过去进行时啦~
再问： 那个延续性动词在哪个位置，说明一下好吗？
再答： 我不知道什么是延续性动词啊，离开祖国有几年了，英语语法都忘记了。 但我猜想你指的是动词的长度。 所以这里doing homework中的doing 应该是所谓的延续性动词。 因为做作业是需要一点时间的。 不像关门，是个瞬间的动作。
当你兄弟回来时是过去式,所以后面形容我在做作业时也是过去时,因为是while 表明是与你弟弟回来同时发生的事情,所以是进行时,加起来就是过去进行时啦~
再问： 那个延续性动词在哪个位置，说明一下好吗？
再答： 我不知道什么是延续性动词啊，离开祖国有几年了，英语语法都忘记了。 但我猜想你指的是动词的长度。 所以这里doing homework中的doing 应该是所谓的延续性动词。 因为做作业是需要一点时间的。 不像关门，是个瞬间的动作。
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bother doing /to do