no sooner…than

它的意思相當于“剛做完A這件事,就做B這件事”.例如：
He had no sooner returned than he bought a house.
他一回來就買了一套房子.
如果no sooner 位于句首,主句要用倒裝結構.例如：
No sooner had he arrived than he went away again.
他剛到就又走了.
No sooner had the game startedthan it began to rain heavily.
運動會剛開始,天就下起了大雨.
有一點要注意,no sooner…than 一般用來描述做過的事情,它不能用于表示將來的事.