Level B1 Negative Sentence of Sentence Structure 是…… 的

My suggestion is that you read Level B1 Sentence Structure 是……的 first before you start to read the following content.

The previous post: Level B1 Sentence Structure 是……的 covers basic rules of making 是……的 structure sentence. This post will cover how to make negative sentence in this structure.

To make negative 是…… 的 sentence, you only need to add 不 before 是.

Now I am going to review those examples, then make the negative sentences of them.

He went to Xi'an yesterday.
他昨天去了西安。

To emphasize that he went to Xi'an yesterday, not another day.  

他是昨天去西安的。

But, if he actually went to Xi'an the day before yesterday, not yesterday, you want to deny the time information. Then we need to make a negative sentence by adding 不 before 是 to emphasize that it's NOT yesterday.

It's not yesterday when he went to Xi'an.
他不是昨天去西安的。

He went to Xi'an by plane yesterday.
他昨天坐飞机去了西安。

To emphasize the time part:
他是昨天坐飞机去西安的。
The negative sentence will be :
他不是昨天坐飞机去西安的。

To clarify that he took plane, not train or bus.
他昨天是坐飞机去西安的。
The negative sentence will be:
他昨天不是坐飞机去西安的。  （ Maybe he went to Xi'an by train.)

He went to Xi'an by plane yesterday to visit a friend.
他昨天坐飞机去了西安去见一个朋友。

To clarify the time:
他是昨天坐飞机去西安去见一个朋友的。
The negative sentence will be:
他不是昨天坐飞机去西安去见一个朋友的。

To emphasize the way of transportation:
他昨天是坐飞机去西安去见一个朋友的。
The negative sentence will be:
他昨天不是坐飞机去西安去见一个朋友的。

To emphasize the purpose:
他昨天坐飞机去西安是去见一个朋友的。
The negative sentence will be:
他昨天坐飞机去西安不是去见一个朋友的。 （Maybe he went to Xi'an to have a meeting. )

Related posts:
Making Question with 是……的 structure
Level B1 Sentence Structure 是……的