which sentence is in the imperative voice

1 how much homework do you have
2 is it important to do homework
3 do your homework as soon as you get home
4 homework should be done thoroughly

i think its the 3rd one am i right?

Yes.

Imperative = command

Yes, you are correct! The third sentence, "Do your homework as soon as you get home," is in the imperative voice.

The imperative voice is used for giving commands, making requests, or giving instructions. In this case, the sentence is giving a command or instruction to someone to do their homework. It starts with the base form of the verb, which is "do," without any subject.

To identify sentences in the imperative voice, you can look for base form verbs at the beginning of the sentence that give a command or instruction. In this case, the verb "do" is in the base form and is giving an instruction to "do your homework."