介绍:
This is (这是) This is a bike.
That is (那是) That is a bike.
These / Those
These are…（这些是…）
These are bikes.
These are not…=These aren’t……（这些不是…）
These are not bikes. =These aren’t bikes.
Are these…？（这些是…吗？）
Are these bikes？
Yes, they are.
No, they aren’t.
Those are…（那些是…）
Those are bikes.
Those are not…=Those aren’t……（那些不是…）
Those are not bikes. =Those aren’t bikes.
Are those…？（那些是…吗？）
Are those bikes？
Yes, they are.
No, they aren’t.
单复数句型之间的转换
This is a bike. 这是一辆自行车。
⇅ ⇅ ⇅
These are bikes. 这些是很多自行车
That is a bike. 那是一辆自行车。
⇅ ⇅ ⇅
Those are bikes. 那些是很多自行车
造句：
1. 这些是围巾。（scarf）
2. 这些不是我的书。
3. 那些是你的盒子吗？
是的，它们是。
句型转换（将单数句型变为复数）：
1. This is a cherry.
2. That is a glass.
句型转换（将复数句型变为单数）：
1. These are ducks.
2. Those are scarves.
答案：
1. These are scarves.
2. These are not my books.
= These aren’t my books.
3. Are those your boxes?
Yes, they are.
1.These are cherries.
2. Those are glasses.
1. This is a duck.
2. That is a scarf.
大家还在听
