Correct the sentences.
Examplete:The wolf saw the Monkey.–The wolf didn't see the monkey.
1 The wolf drank the water.
2 The sheep made the water dirty.
3 The wolf met the sheep before.
4The sheep came to the river a year ago.

1 The wolf didn't drink the water.2 The sheep didn't make the water dirty.3 The wolf didn't meet the sheep before.4The sheep didn't come to the river a year ago.