fell behind的用法和樣例：
例句
用作動(dòng)詞 (v.)
- Soon he fell behind in the race.
不久他就跑在后頭了。 - He fell behind, so he had to quicken up his pace to catch up with us.
他落在后面，所以他必須加快步子趕上我們。 - He could have finished it on schedule, but somehow he fell behind.
他原本能按預定進(jìn)度做完這件事的，但不知怎地卻落后了。 - The woman fell behind in her rent payments.
這個(gè)女人拖欠了租金。
