有些朗文新概念英语第二册上的问题1.P51页:our clabichord is kept in the living room.that;s where we are kept it.为什么这儿选kept不选have kept不选完成时呢2.P51:who bought it?grandfather did 为什么选bought不选did

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有些朗文新概念英语第二册上的问题1.P51页:ourclabichordiskeptinthelivingroom.that;swherewearekeptit.为什么这儿选kept不选havekep

有些朗文新概念英语第二册上的问题1.P51页:our clabichord is kept in the living room.that;s where we are kept it.为什么这儿选kept不选have kept不选完成时呢2.P51:who bought it?grandfather did 为什么选bought不选did
有些朗文新概念英语第二册上的问题
1.P51页:our clabichord is kept in the living room.that;s where we are kept it.
为什么这儿选kept不选have kept不选完成时呢
2.P51:who bought it?grandfather did
为什么选bought不选did buy这区别在那儿
3.同页:it's kept in the living room.that's where we hold it.
为什么选hold不选have 区别在哪呢,能用hve 呢
4.P55:pay it again和pay it once more 区别是什么

有些朗文新概念英语第二册上的问题1.P51页:our clabichord is kept in the living room.that;s where we are kept it.为什么这儿选kept不选have kept不选完成时呢2.P51:who bought it?grandfather did 为什么选bought不选did
1.因为这里不用现在进行时
2.后面有个did,前面问题就用过去时bought
4.一个是又,另一个是些