从句作主语一定要按单数主语看待。，从句主语时谓语用单数还是复数

知识点1:从句作主语一定要按单数主语看待。

［误］ What he said are right

［正］ What he said is right

［析］ 从句作主语一定要按单数主语看待。

［正］ The rich is not always happy


知识点2:从句主语时谓语用单数还是复数

Whoever breaks this law deserves a fine. 违反本法者应予以罚款。
若用作主语的是what引导的从句，且其后为系表结构，此时需注意以下两点：
1. 若表语为复数，主句谓语通常用复数。如：
What I want are details. 我要的是细节。
What is needed are rational and firm actions. 所需要的是合理的坚决的行动。
2. 若what从句中的what表复数意义，则主句谓语动词要用复数。如：[1]谓语动词,动词,相关知识点

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His muscles were wasting away, and what were left were flabby. 他的肌肉正在消耗，所剩下的就是松弛的皮肉。