He sits up till late at night.

He stays up till late at night.

I stayed up till late last night.

I stayed up till late at night.

I stayed up late.

Mary stayed up late last night.

He sat up late last night.

He stayed up late last night.

I stayed up late last night.

I sat up till late last night.

You must not sit up late.

Don't stay up late at night.

She sat up late last night.

She stayed up late last night.

I stayed up late last night.

Don't sit up late at night.

Don't stay up late at night.

It's not good to stay up late at night.

I'm used to staying up late at night.

Mary stayed up late last night.

I often sit up late at night to read.

I am used to staying up till late at night.

They always sit up late doing their homework.

She is used to staying up late.

The girl was used to sitting up till late.

The girl was used to staying up late.

As is often the case with him, he sits up late at night.

He would often sit up until late at night.

He often used to stay up until late at night.

So I went to sleep, and that was it for me.

Gonna stay up late.

Gonna stay up late.

He often sits up late writing letters.

Gonna stay up late.

Seven, eight, better stay up late

I stayed up much later when I was a student.

Seven, eight, gonna stay up late

Seven, eight, gonna stay up late

Seven, eight, better stay up late

Up late.

I would often sit reading far into the night.

I stayed up till late at night.

Mary is sitting up late this week to prepare for her finals.

Mary is staying up late this week to prepare for her finals.

Mary is staying up late this week to prepare for her term end tests.