晚上十点以后大门就关了。

Wǎnshang shí diǎn yǐhòu dàmén jiù guān le.

After ten at night the main gate is closed.

请从那边的大门进去。

Qǐng cóng nàbian de dàmén jìnqù.

Please go in through the gate over there.

学校大门早上七点开。

Xuéxiào dàmén zǎoshang qī diǎn kāi.

The school gate opens at seven in the morning.