Soto wa samui desu ga naka wa atatakai desu.

takai desu kara, kaimasen →

hisogashi desu kara, tv o mimasen →

Q: Dooshite kaimasen ka ?

A: Takai desu kara.

to be hungry = onakaga sukimasu

to be thirsty = nodoga kawakimasu

to be tired = tsukaremasu