2. 引导状语从句(两者可换用)：

不管是谁打电话来, 都说我出去了。

正：Whoever phones, tell them I’m out.

正：No matter who phones, tell them I’m out.

不管是谁这样说, 那都是错的。

正：Whoever says so, it is wrong.

正：No matter who says so, it is wrong.