问题描述:
英语:为什么有这么多单词在句子中要加ing形式
比如说:I join the swimming club.he is working and eating.等等,请问为什么呢?
再比如说:Look,he is working.
比如说:I join the swimming club.he is working and eating.等等,请问为什么呢?
再比如说:Look,he is working.
问题解答:
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