5 Read the examples. Then rewrite the sentences using the correct modal verb.
You can/can't camp here. (It's allowed /it isn't allowed.)
Snakes can be very dangerous. (It's possible.)
Alligators can/are able to run very fast. (They are able to.)
Sam can't/isn't able to swim very well. (He isn't able to.)
Can/Could I borrow your boots? (Is it OK? Asking for
permission - informal/formal)
You must keep off the grass. (It's the rule.)
You mustn't feed the alligators. (It isn't allowed. It's
forbidden.)
You have to be careful. (It's necessary.)
You don't have to travel by ferry. (It isn't necessary.)
1 It's forbidden to swim in the lake.
You can't/mustn't swim in the lake.
2 Is it OK to use your insect repellent?
3 It's possible to see alligators there.
4 We are allowed to put up our tent here.
5 Alligators aren't able to move fast in circles
6 It's possible that you will get lost there.​

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