she wasn't feel unhappy yesterday.这句话有什么错误?

回答：wasn't和feel不能在一起连用

可改为She felt unhappy yesterday.

既然有了wasn't,后面就不能再跟feel的原型了,应该是过去进行时she wasn't feeling unhappy yesterday.但是根据句意用过去进行时不大恰当,也可以用一般过去式
she didn't feel unhappy yesterday