---Here is a letter for you.---Thank you.Who is it from?---Tom ______ Tom后面填does 还是writes,为什么?

问题描述:

---Here is a letter for you.---Thank you.Who is it from?---Tom ______ Tom后面填does 还是writes,
为什么?

答案:does
这是do的一种用法,用作带动词,第三人称用does,代替writes

does用这个,是口语,

does,这里面省略了实意动词.