有非常详尽的讲解,是笔者多年一点一点的积累。
either...or, not only...but also作主语时，谓语动词遵循“就近原则”，与最邻近的那个名词或代词保持数的一致。如：
1). Alice has seen the film twice. Sandy has seen it twice, too.
_________ Alice_________ Sandy have seen the film twice.
答案: Both; and。both…and 表示“(两者)都”。
2). This store sells men’s shoes, and it also sells men’s clothes.
This store sells _________ _________ men’s shoes _________ _________ men’s clothes. 答案: not only; but also。not only...but also示“不仅……而且”之意。
近几年上海英语中考句型转换归类真题：
A. 改成反义疑问句
1. They could hardly believe the news.
They could hardly believe the news,
2. Mary bought some shampoo in the supermarket.
?
3. Tom didn’t take part in the after-school activity yesterday.
Tom didn’t take part in the after-school activity yesterday, ?
66. Let's take a picture in front of the fountain.(2009)
Let's take a picture in front of the fountain, ？
答案：1. could they 2. didn’t she 3. did he shall we
B. 改成一般疑问句
1. I enjoy individual sports.
________you ________ individual sports?
2. We do eye exercise every day.
_________ you eye exercise every day?
3. Every Monday morning Mr. Johnson has a meeting.
__________ Mr. Johnson a meeting every Monday morning?