Usages of zikan

かん を めること は できません。zikan wo tomerukoto ha dekimasen.
(You) cannot stop time.
Using は in this sentence might be more suitable because it is more all-encompassing than が (it implies that no one can stop time), while が is more specific and might refer to something like being unable to stop time on a personal capacity.
かん が ありません。zikan ga arimasen.
(I) have no time.; There is no time.
かん です。zikan desu.
It's time.
とても つかれて います よ。 さんかん だけ ました。totemo tukarete imasu yo. sanzikan dake nemasita.
I'm really tired. I only slept for three hours.
そろそろ かん です。 った ほう が いい です。sorosoro zikan desu. itta hou ga ii desu.
It's nearly time. You should go.
わり が ちかい です。 もう かん が ありません。owari ga tikai desu. mou zikan ga arimasen.
The end is near. There's no longer any time left.
しゅうまつで、 かん が ある。syuumatude, zikan ga aru.
It's the weekend, and I have time.
テレビ を す かん です。terebi wo kesu zikan desu.
It's time to turn off the TV.
くつ を みがく かん が ありません。kutu wo migaku zikan ga arimasen.
(I) don't have time to polish my shoes.
たいせつな かん を ありがとう。taisetuna zikan wo arigatou.
Thank you for the precious time.
かん が りない なあ。zikan ga tarinai naa.
There's not enough time, is there.

なあ is used here to both express reflectiveness and seek confirmation

バス が がっこう に く かん は なん です か?basu ga gakkou ni tuku zikan ha nanzi desu ka?
What time does the bus arrive at school?
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