15) 肯定句变否定句及疑问句要变化的一些词

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.