なきゃいけない

Meanings

1. Expression

   cannot do without something; indispensable; absolutely necessary
2. have to do

• 自分じぶんでいかなきゃいけませんよ。

  You have to appear in person.

• ウチも分煙ぶんえんしなきゃいけないよねぇ。

  We'll also have to create a separate smoking section, won't we?

• なんで僕ぼくがやらなくちゃいけないの。

  Why do I have to do that?

• すぐに手紙てがみをかかなきゃいけないよ。

  You've got to write to him quickly.

• 午後ごごしなきゃいけない事ことがたくさんある。

  I have a lot of things to do this afternoon.