2 Complete the sentences using can or be able to. Use the proper tense forms.
1) Harry has travelled a lot and he cou speak three languages.
2) I haven't
sleep well this night.
3) Sam
drive but he hasn't got a car.
4) She used
do karate.
5) He
drive slowly if he wants.
6) I can't understand George. I
never understand him.
7) Be careful with the reptile. It
be poisonous.
​

Sure, let's go through each sentence one by one and fill in the blanks with either "can" or "be able to". I will provide an explanation for each answer.

1) Harry has travelled a lot and he can speak three languages.
Explanation: Since Harry has travelled a lot, it suggests that he has had the opportunity to learn and practice three languages. Therefore, we can use "can" to express his ability to speak those languages.

2) I haven't been able to sleep well this night.
Explanation: The phrase "have been able to" is used to talk about ability in the past, so in this case, we use the negative form "haven't been able to" to indicate a lack of ability to sleep well.

3) Sam can drive but he hasn't got a car.
Explanation: The use of "can" suggests that Sam has the skill or ability to drive. However, the phrase "hasn't got a car" indicates that he currently does not possess a car.

4) She used to be able to do karate.
Explanation: "Used to" is used to talk about past habits or abilities, so we can use "used to be able to" to indicate that she had the ability to do karate in the past, but not necessarily anymore.

5) He can drive slowly if he wants.
Explanation: "Can" is used to express ability or permission, so in this case, it denotes that he has the ability to drive slowly if he chooses to do so.

6) I can't understand George. I have never been able to understand him.
Explanation: The phrase "have never been able to" is used to talk about a lack of ability or skill that has persisted over time. In this case, it indicates that the speaker has not been able to understand George in the past and presently does not have that ability.

7) Be careful with the reptile. It may be poisonous.
Explanation: The use of "may" suggests a possibility or potentiality. In this case, it means that the reptile has the potential to be poisonous, so we use "may be" to talk about this potential but without certainty.

I hope these explanations and answers are clear and helpful for you. Let me know if you need any further clarification.