Нужно i haven't seen mary 1999 year. she has never been the usa. they have been working to yether ages.

I haven`t seen Mary since 1999 year. Я не видел Мэри с 1999 года.
She has never been to the USA. Она никогда не была в США.
They have been working there for ages. Они работали там испокон веков.

I haven`t seen Mary since 1999 year
She has never been in the USA
They have been working to yether for ages