1.be down in a minute 馬上就下來
例句:Christopher: I'll be down in a minute.
克里斯托弗:我馬上就下去。
2.happened to do 碰巧……
例句:She happened to be out when we called.
我們打電話時她剛巧不在家。
You don't happen to know his name, do you?
你不會碰巧知道他的名字吧?
It happened that she was out when we called.
我們打電話時她剛巧不在家。
3.cover for sb to do sb's work or duties 代替,頂替,替補(某人工作或履行職責)
例句:I'm covering for Jane while she's on leave.
簡休假時我來頂替她工作。
4.in the front 在前面
in the back 在后座
例句:He sat in the front of the classroom.
他坐在教室的前面。