Choose the right meaning of the sentences below.

Tick the correct answer.

He may be smart.

• I'm sure he's smart.
• I'm sure he isn't smart.
• I'm not sure if he's smart or not.

He can't be smart.

• I'm sure he's smart.
• I'm sure he isn't smart.
• I'm not sure if he's smart or not.

He must be smart.

• I'm sure he's smart.
• I'm sure he isn't smart.
• I'm not sure if he's smart or not.