A, complain about the hot weather.

Ugh, I’ve had enough of these dog days. I am sweat all over.

B, invite A to swim and take a sunbath.

Why not go swimming and take a sunbath with me?

A, say you are good at skiing but mot swimming.

I am not a good swimmer. I wish I could go skiing in the North.

B, persuade A to swim by promising to be his/her guide and lifeguard.

Oh, come on. When in Rome, do as the Romans do. I’ll be your guide and lifeguard. Do come with me. Alright?

A, give your response to the invitation.

No, the sun burns your skin. I’d rather sit before an electric fan eating ice creams.