しないといけません

have to do

→ 為る
phrase Rare #35,751
have to do A polite way to express obligation or necessity. It follows the negative form of a verb; the verb itself can vary.
JA: しっかり勉強しないといけません。
EN: I have to study hard.

勉強しないといけませんか?

Do I have to study?

大通りを渡るときにはいつでも注意しないといけません。

You always need to be careful when crossing a main road.

もう本当にさよならしないといけません。

I really have to say goodbye now.

あの子の年齢を考慮しないといけませんよ。

We have to take that child's age into consideration.