You can only use it informally (with your friends or someone your age) to say hi and bye.

You can say hello all day with this one.

A greeting you would only use from 7pm.

Use this question to ask how anyone is .

Use this question to ask how someone is formally.

You can use this shortcut to ask a friend back to know how they are.

You can use this shortcut to ask your teacher back to know how s/he is.

Use this polite word to say thank you.

Use this polite word to ask for something.

Use this reply after someone thanks you

You need to get past someone in the métro.

You want to apologize.

You can wish someone a good trip.

Wish someone a good afternoon.

Wish someone a good day.

You will see someone again tomorrow.

You will see someone again next week.

You will see someone again soon.

You will see someone again later.