Modal verbs

We ... wait for her any longer.

... you start working immediately?

She ... play tennis in her youth, couldn't she?

We ... use the definite article with this noun, can we?

His son ... be out after nine o'clock, can he?

Which of your students ... to work as an interpreter?

... she still be speaking to her English teacher?

... they be waiting for someone?

... the boy be looking for me?

They ... still be skating.

... I trouble you for a glass of water?

... I ask you to do me a favour?