Indicating ability with ことができる

QuestionAnswer
thing; situation; verb nominalizer
〜こと〜koto
to be able to; to be possible to
〜こと が できる〜koto ga dekiru
Can I see that?
それ を ること が できます か。sore wo mirukoto ga dekimasu ka.
(I) can speak Japanese.
ほん を はなすこと が できます。nihongo wo hanasukoto ga dekimasu.
(I) can speak Japanese.
ほん が できます。nihongo ga dekimasu.
time
かんzikan
It's time.
かん です。zikan desu.
(I) have no time.; There is no time.
かん が ありません。zikan ga arimasen.
(You) cannot stop time.
かん を めること は できません。zikan wo tomerukoto ha dekimasen.
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.

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