The sentence I came up with was:

> 私は、学生は勉強を完了するために睡眠時間を短くする寝がちですから、これが起こると思います。

So essentially I was using がち to say how students "tend to/have a tendency to"
sleep less. My 先生 said I used it wrong, without giving proper advice. Any help
would be appreciated!
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2023-05-28T13:14:11.313
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question
grammar syntax
I'm struggling to understand how to use がち
`[V ます-stem]-がち` works as a な-adjective. So you begin with a verb phrase and
end up with a な-adjective.

Your sentence appears to have started from this verb phrase.

> x 睡眠時間を短くする寝ます

This is syntactically wrong because it has two verbs with no proper connector.

Let’s use the first verb.

> 睡眠時間を短くします

From this you get the following correct sentence.

> 睡眠時間を短くしがちです

〜がち being an adjective, you can use it attributively, too.

> 睡眠時間を短くしがちな学生

短く寝がち (without 睡眠時間を) is grammatical but not idiomatic because the original
verb phrase 短く寝ます is not idiomatic. 遅く寝ます is better with focus on the time you
go to bed (i.e. start to sleep), rather than the duration.

> 遅く寝がちです
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2023-05-29T02:12:27.823
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2023-05-29T02:12:27.823
43676
99770
answer