Read the sentences and say how we can form negations in

In present perfect, we can form negations in two ways: using full or contracted form. To use a full negation form in Present Perfect, put the negative word not between the auxiliary verb have and the participle. To make a contracted form, add hasnt/havent after the subject. Read the examples below: the first sentence demonstrates a  full form, the second - a contracted form.

1. I have not been to London. I havent been to London.

2. We have not been to Washington. We havent been to Washington.

3. You have not been to Boston. You havent been to Boston.

4. I have not been to Moscow. I havent been to Moscow.