题目内容
9.汤姆正在忙着给他的父母写信.Tomis busy writing a letter to his parents.
分析 is busy writing.
解答 答案:is busy writing.表达的是客观事实用一般现在时,表示忙于做某事用be busy doing sth,主语Tom三单,故is,写信write a letter to,故答案是is busy writing.
点评 be busy doing sth侧重于动作 sth 是名词哦•do是动词的形式
be busy with sth 侧重于状态
意思都一样,可以互换.
He is busy doing homework.=
He is busy with homework.
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