Must, Have to, Need to, and Don't Have to

Your new flatmate left you a note on the fridge. Drag the correct words to complete it! 🧹

"Hey! A few things about the flat: We [*have to*|must to|don't have to](?) take the bins out every Thursday — the council collects them Friday morning. You [have to|*don't have to*|need to](?) clean the bathroom today because I already did it this morning. Oh, and the landlord said we [have to|don't have to|*must*](?) keep the front door locked at all times. Safety first! 🔑"

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The correct answer for the first blank is **have to**.

>**Have to** is used for an external obligation — the council sets the collection schedule. Note: "must to" is never correct.

The correct answer for the second blank is **don't have to**.

>**Don't have to** means there is no necessity — the bathroom is already clean, so it's not needed.

The correct answer for the third blank is **must**.

>**Must** is used here because the landlord is giving a strong, direct instruction about safety. Both "must" and "have to" can express obligation, but "must" often reflects the speaker's/authority's strong personal insistence.
