Corrección.

Corrección

they must their double slowly at university for a year

how must they make their double bed at university for a year?

Simple past

- they made their double bed slowly at university yesterday

-where did the make their double bed slowly yesterday?

Be going to

-the´re going to make their double bed slowly at university tomorrow

-when are they going to make their double bed at universit

Present perfect

- they have made their double bed slowly at university for a week -

- how long havethey made their double bed at university?

Present tense

- they make their double bed slowly at university

-what do they make slowly at university?

.which bed do they make slowly at university ?