(positive)
1. You should go there soon
2. Kean will come
3. They must visit her by now
4. My Dad could come yesterday
5. He can cook
6. Laura can drive a motorcycle.
7. They can buy milk at the supermarket.
8. I can meet him at the school tomorrow morning.
9. I could be a driver if I have the training I need.
10. The bird could fly if it has a pair of wing.

(negative)
1. Erwien might not call me tonight
2. The baby can’t talk
3. They shouldn’t go there
4. He couldn’t visit me
5. She won’t come next week