学好知识就需要平时的积累。知识积累越多，掌握越熟练，精品学习网编辑了肯定句变否定句知识点复习整理：精选八年级上册英语，欢迎参考!

1.some变为any。如：

There are some birds in the tree.→There aren't any birds in the tree.

但是，若在表示请邀请、请求的句子中，some可以不变。如：

Would you like some orange juice?

与此相关的一些不定代词如something, somebody等也要进行相应变化。

2.and变为or。如：

I have a knife and a ruler.→I don't have a knife or a ruler.

3.a lot of (=lots of)变为many或much。如：

They have a lot of friends.(可数名词)→They don't have many friends.

There is lots of orange in the bottle.(不可数名词)

→There isn't much orange in the bottle.

4.already变为yet。如：

I have been there already.→I haven't been there yet.

通过对肯定句变否定句知识点复习整理：精选八年级上册英语的学习，是否已经掌握了本文知识点，更多参考资料尽在精品学习网!

相关链接：

精选初二上册英语知识点复习：第三单元

最新初二上册英语知识点复习整理：Unit 2