倒装共分两类：全部倒装和部分倒装。全部倒装是指将全部谓语动词都放在主语之前。部分倒装是指将谓语的一部分如助动词,系动词或情态动词放在主语之前。如果句中的谓语没有助动词或情态动词，则需添加助动词do, does或did，并将其放在主语之前。
5 always \ often \ particularly \ many times \ many a time 放在句首时，句子进行部分倒装。
Always am I amazed when I hear people saying that computers can replace teachers.
6让步状语从句由though或as引导时可用倒装，将表语放在句子最前面。
Fascinating as computers utilized in education seem, teachers’roles are more imperative.
7 so that 引导的结果状语从句可用倒装。
So severe is this problem that we have no alternative but to take some feasible measures to deal with it.