alter [ ˈɔ:ltə(r) ] v. 更改、改变

1. the alteration of sth 某事的变化

2. alternate with... 与……交替

3. alternate in (doing) sth 轮流做某事

4. alternate between A and B 在A和B之间交替

shift / move 这两个单词都有“移动”的意思。

shift强调改变、转变；另有“轮班”的意思。

move 则指移动、搬动、迁移和活动等。

· The wind shifted from north to south.

风向由北转向南。

· She moved the desk to the classroom by herself.

她自己把课桌搬到教室。

Q The wind has ______ from north to east.

1. change 2. moved 3. shifted