How to use Can't and Can't Have

Can't

Can't is often used when we think that something is impossible at the present moment.

"Helen can't be in Spain because I saw her driving past my house this morning."

Can't have + past participle

Can't have + past participle is used when we are sure that something did not happen in the past.

"He can't have been at the meeting, he's on a business trip this week."
"They can't have bought it today because the shops are closed."

Now choose the correct form to complete each sentence.

Link: How to use have and has

• 1 - My boss said we ___ a holiday at the moment because we're too busy.
  
  can't taken
  can't have took
  can't take
  can't taking
  
  
• 2 - You ___ Terry yesterday because he's in Paris all week.
  
  can't have seen
  can't seen
  can't seeing
  can't have saw
  
  
• 3 - She can't ___ , she doesn't speak English.
  
  understanding
  understood
  have understood
  have understand
  
  
• 4 - They can't ___ it all yet, the movie is too long.
  
  have watching
  watched
  have watch
  have watched
  
  
• 5 - You ___ on this train. You will have to wait.
  
  can't smoke
  can't smoking
  can't have smoked
  
  
• 6 - Sorry, you ___ in right now. Come back later
  
  can't come
  can't have come
  can't came
  can't coming
  
  
• 7 - Susan ___ drive a car yet.
  
  couldn't have
  can't to
  can't