1. so did he, so he did, he did so 辨析：
① I read the poem, and so did he. 我读了这首诗，他也读了。
②—He read the poem very well. —Yes, so he did.
——这首诗他读得很好。——是的，他确实如此。
③I asked him to read the poem, and he did so. 我请他读这首诗，他照做了。
2. so it is with...这种结构，不用倒装。
当前面两个句子，一个是肯定式，一个是否定式，或者前后谓语动词不一致，或者是一个复杂的句子时，则要用So it is with…, 例如：
Tom likes singing, but he doesn’t like dancing. So it is with Mary. 汤姆喜欢唱歌，但他不喜欢跳舞。玛丽也是如此。
John is clever and studies hard. So it is with Mary. 约翰聪明又用功，玛丽也是如此。
