I can not believe how fast time flies.

She can not attend the meeting due to a prior commitment.

They can not find their way back home without a map.

He can not finish the project on his own.

You can not ignore the importance of education.

We can not afford to make any mistakes in this situation.

The dog can not reach the food on the top shelf.

I can not understand why she is upset.

You can not expect to succeed without hard work.

They can not go outside because of the heavy rain.