6. before 句型： (1) before sb can/ could … 某人还没来得及…… 我还没来得及插话，他就给我量好了尺寸Before I could get in a word ,he had measured me.
(2) It will be +时间+ before + 还有多长时间…… 他还有四年时间变毕业了。It will be 4 years before he graduates.
(3) had done some time before (才……) 我们航行了四天四夜才见到陆地。We had sailed four days and four nights before we saw land.
(4) had not done --- before --- 不到……就…… 我们还没走到一英里路就觉得累了。We hadn’t run a mile before he felt tired.
(5) It was not +一段时间+ before 不多久就…… 还没到两年他们离开了那国家。It wasn’t two years before he left the country