Every night, as soon as it turns 10 o'clock, I fall asleep.

I run errands for the president every day.

I have to submit the report at the end of the month.

What he did can't be undone.

What he did was an irretrievable mistake.

He tidied up the room quickly.

The hanging clothes of the mulberry tree are a symbol of the arrival of spring.

When I see the mayfly, I feel that summer is approaching.

This tempura of insects looks very delicious, doesn't it?

Who is the main character?