When the teacher entered the classroom,he found the students already ___.A.seatingB.seatedC.sitD.sits.

问题描述:

When the teacher entered the classroom,he found the students already ___.
A.seating
B.seated
C.sit
D.sits.

already 与过去时的用法
选 C sit
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答案选B. seated

选择B. seated
seat作为一个动词,是一个使动动词哦,及物动词,后面必须跟宾语,seat oneself, 坐下的意思。一般口语中多用其被动语态be seated,表示坐下的意思。
find sb doing sth 发现某人在做某事
find sth done 发现某事被做
这边用到的是特殊的被动句,be seated,所以be省略,要么就用sitting,因为sit是不及物动词
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B seated 表示“已经坐好了”

B.seated是过去分词“让某人就坐”做宾补,这个动作是宾语的students发出的,他们自身又承受了这个动作.
seating是现在分词,表主动意义;sit和sits是谓语动词形式,不可在此做宾补;