see sth done 看见某物被……（过程已结束）see sth being done 看见某物正在被……（过程在进行）
原句意为：这种方法一定很有效,因为我已看到它（上面提到的this method）被许多不同的人应用到工作中.B选项是看到它正在被应用,不能表现出前文的“一定很有效”.或者说因为看到“已被应用"（看到了效果）,所以肯定”这种方法很有效“.
英语单选一个困惑This method must be very effective,for I’ve seen it
3个回答
相关问题
-
I____this method______for me.选哪个呢?
-
动词不定式选择题4His method has proved _____ very effective and it i
-
This method has been proven to be still effective.
-
就一道英文单选——Have you ever seen a whale alive?——Yes,I've seen___
-
i've seen it
-
I've written it for you because I hope this way can be helps
-
2012怀柔一摸英语单选I have had this novel for three weeks.I_____it i
-
It must be very difficult for them to be trained as very ski
-
I think it must be very nice中文
-
---I've seen this movie.---When __you ___it A.do,see B.have,