There are a lot of writings dealing with the teaching of English reading.为什么这里的deal要加ing

There are a lot of writings dealing with the teaching of English reading.为什么这里的deal要加ing
There are a lot of writings dealing with the teaching of English reading.
为什么这里的deal要加ing

There are a lot of writings dealing with the teaching of English reading.为什么这里的deal要加ing
因为已经有了谓语动词are,其他的动词要处理成非谓语动词,这里的writings 和deal 是主动关系,因此用deal 的现在分词