几个五年级英语的句型she was a teacher many yeary ago变一般疑问句there were s

Was she a teacher many years ago?
There weren‘t any trees before?
Did she teach English five years ago?
改一般疑问句很简单,有be动词的话只要把be动词（be动词一般为：is,are,was were.）提前就好了.如果没有be动词的话就自己加助动词（助动词为：do ,did ,does）加在句首,如果是过去式记得did后面加原型,不要忘了变.一般的考点都是在这里.
改否定句的话就更简单了,只要在be动词或助动词后面加not或n't（not和n't没有区别,用哪个看你的习惯）就行了.