1.起承上啟下的作用
Otherwise,we should commit a serious mistake.否則,我們會犯嚴重錯誤。
That is to say,we have to study harder.也就是說,我們應該更加努力學習。
2.起解釋作用
He is right,I think.我認為他是對的。
The trees in that area,it is said,are mostly over thirty feet tall.
那一帶的樹據(jù)說多數(shù)都三十多英尺高。
3.對整句進行解釋
Strangely,he has not been here lately.奇怪的是他最近一直沒有來。
By the way,where is Xiao Li? 順便問一問,小李在哪兒?