be busy in Ving,这样的用法是固定搭配吗?在busy后加上介词in,是英语中的固定搭配吗?
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be busy in Ving,这样的用法是固定搭配吗?在busy后加上介词in,是英语中的固定搭配吗?
be busy doing 和 be busy in doing 的区别?
be ving中ving是什么意思
be busy in 的用法?它和be busy doing, be busy with有什么区别?
BE BUSY IN DOING 的例句
be busy in 用法
busy的用法be busy with后面加什么词be busy in doing与be busy with doing与be busy doing有什么区别
My uncle is a scientist.He is always busy with _research_ work这里的research为什么是adj?不是这里面有个短语是be busy with 加n或Ving吗?急
为什么be+ving
be busy in doing sth
be busy (in) doing sth 和be busy with sth的意思 并做一组句子用这两个短语分别做个句子
occupy in 与 be busy for 的区别
用be busy in v-ing怎么造句
be+Ving是谓语吗
1.be busy(in )doing 2.be busy to do 3.be busy with 4.be busy for区别?
一般将来时:主+will+V原主+be+always+Ving主+spend+时间段+in+doing sth 各造三句,
be busy doing中,有in么?
be busy with与be busy doingD的区别