Japanese 259 - Have to do - ないといけない

To say that you have to or must do something, you can use a verb in plain negative form + ~と いけない.

You can also use いけません in place of いけない to make the sentence more formal.

It's also possible to replace といけない with とダメです. ダメ essentially means no good, but it can also mean cannot/not allowed. Note that ダメ is spelled using katakana here, but in other cases it's often spelled using hiragana.

In very informal situations you can simply use the verb in plain negative form + ~と, omitting the final いけない.

There are also different ways to say must do, but we will look at those in a later lesson.