in 是介詞 come in是動(dòng)詞
一般英語(yǔ)表達(dá)里come in 后面不會(huì)加the room,
如果你要說(shuō)走進(jìn)房間,可以說(shuō)go into the room
come in 是走進(jìn)來(lái)的意思,如果是“he comes in the room"你要怎么翻譯呢?中文你也不會(huì)這樣表達(dá)
給幾個(gè)例句參考：A girl came in with a textbook in one hand and chalk in the other.
一位姑娘一只手里拿著一本書(shū),另一只手里拿著粉筆,走了進(jìn)來(lái).
Two teachers came in,one was our maths teacher,the other was your English teacher.
兩位老師進(jìn)來(lái)了,一位是我們的數(shù)學(xué)老師,另一位是你的英語(yǔ)老師
The doctor came in,followed by several nurses.
醫(yī)生進(jìn)來(lái)了,身后跟著幾個(gè)護(hù)士.
如果加賓語(yǔ),這個(gè)應(yīng)該是不及物動(dòng)詞來(lái)的,不可以直接加賓語(yǔ)
come into才是及物動(dòng)詞