关于while的用法 Toby was watching TV while Tim____(do)his homework at 7 PM

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关于while的用法 Toby was watching TV while Tim____(do)his homework at 7 PM
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关于while的用法 Toby was watching TV while Tim____(do)his homework at 7 PM
关于while的用法 Toby was watching TV while Tim____(do)his homework at 7 PM

关于while的用法 Toby was watching TV while Tim____(do)his homework at 7 PM
while前后动词时态一致
不一定要动词,to do ,do都可 ,前后一致就行

过去的某一时间正在做某事应用过去进行时 故填was doing
while 表示两个动作同时进行时也可用when替换 两者的区别就是while后面接的是进行时 而when既可以接进行时又可以接一般时

was doing

while后面不鸡道 = = 我一直觉得通用来着 前面我也觉得通用来着……

did