Often you know from experience how long it takes you to write a short essay,to study for a quiz,or to review for a final
问题描述：
Often you know from experience how long it takes you to write a short essay,to study for a quiz,or to review for a final exam.
这句话中often是什么成分,起什么作用?How long it takes you .这句话是什么成分?是不是在experience和how long.中省略了that?还有,这句话和how well you use your study time都希望能分析一下其语法.感激不尽!
答
often就像是usually这样吧 放在句首 就是 通常来说……How long it takes you .这句话是什么成分?是you know的宾语吧it takes you + 一个时间 然后how long it takes you…… 就是说做什么要花你多长时间的意思嘛如...