完全倒装：谓语动词完全移置主语之前 例如：The boy rushed out.变为Out rushed the boy.
The girl comes here.变为Here comes the girl.
部分倒装：只把助动词（do/did/was/were/will/had/have/has）或情态动词（can/must/should/would/ought to/might/could）移置主语之前 例如：If I were a bird,I would fly up to the tree.变为Were I a bird,I would fly up to the tree.
If I did so,I would...变为Did I do so,I would...