Positve sentences tell us what something is, has or does.
The cat is black. It plays with string. It
has kittens.
Negative sentences tell us the opposite. The word not is
included in the sentence. Don't forget that not is
often shortened to n't. For example, can not
becomes can't, does not becomes doesn't and
so on.
The cat isn't black. It doesn't
play with string. It hasn't got kittens.
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