We want you to come to the cinema.

(Biz) Senin de sinemaya gelmeni istiyoruz.

Biz = we

sen = you
de = also, too, as well.  

What does this mean

Senin de sinemaya gelmeni istiyoruz.

We want you to come to movies, as well.

We want you also to come to cinema 

What does this mean

Senin de sinemaya gelmeni istiyoruz.

We want you to come to cinema (with us)

What does this mean

Senin sinemaya gelmeni istiyoruz.