... have lunch at the restaurant.
Let´s have lunch at the restaurant.
... ask that policeman.
Let´s ask that policeman.
... we go to the park today?
Shall we go to the park today?
... you tidy your bedroom?
Why don´t you tidy your bedroom?
Where ... we meet?
Where shall we meet?
... go to the cinema tonight.
Let´s go to the cinema tonight.
... I open the window?
Shall I open the window?
... go on the Internet.
Let´s go on the Internet.
... you play a computer game?
Why don´t you play a computer game?
... you take him to the zoo?
Why don´t you take him to the zoo?
... we watch a DVD?
Why don´t we watch a DVD? Shall we watch a DVD?
... we play tennis together?
Why don´t we play tennis together?
... have a drink.
Let´s have a drink.
... we go cycling together?
Shall we go cycling together? / Why don´t we go cycling together?