やらなきゃ

have to do, must do

→ 遣る
やら do, carry out + なきゃ necessity ('must')
verb · informal Uncommon #16,088
have to do, must do Colloquial contraction of やらなければならない.
JA: 今日は宿題をやらなきゃ。
EN: I have to do my homework today.
Conjugation of 遣る

何でトムはそれやらなきゃいけなかったの?

Why did Tom have to do that?

好き嫌い言ったところで、今すぐやらなきゃ駄目だろ。

Whether you like it or not, you've got to do it right now.

自分ひとりでやらなきゃダメだね。

I guess I have to do it all by myself.

今夜はやらなきゃいけない仕事がある。

I have work I need to do tonight.

今すぐやらなきゃ駄目だよ。

You have to do it right now.

台本通りにやらなきゃ

I have to stick to the script.

— PERFECT BLUE (1998)

トムは何をやらなきゃいけないって言ってた?

What did Tom say he had to do?

やらなきゃ勝てっこないよ。

If you don't do it, there's no way you'll win.

宿題やらなきゃ。

I have to do my homework.

私もっと良くやらなきゃ

I have to do better.

— ムーンライズ・キングダム (2012)

やらなきゃいけなかったのなら、あの時やってたよ。

If I’d had to do it, I would have done it then.

今日中にやらなきゃいけない宿題が山ほどあるのに、まだ全然手をつけていないよ。

I have tons of homework to finish today, but I haven’t even started yet.

テスト勉強やらなきゃいけないんだ。

I have to study for the test.

手当てしてやらなきゃ

I need to tend to it.

— レザボア・ドッグス (1992)