基本信息
●强调句：可以轻松地将时间、地点、原因、方式等类型状语从句转变为强调时间的强调句。
It was not until I arrived home that I realized I had left the bag on the shop counter.
●倒装句：只要句中有介词短语或状语从句，便可将其提前，变成倒装句。
Only when I turned right at the crossing did that car crack towards me.
Only by this means can he escape from the big fire.
