Which of the following is an example of imperative mood?
if you would like to go out to eat, then you should finish chores now.
take out the trash before you leave for school, .
the tide will be rising when we enter the water for our dive.
were we to begin any later, we would miss the best views of the sunset.

Among the choices presented above, the sentence in imperative mood is:

Take out the trash before you leave for school, please. 

Imperative mood of sentence may express command or request. In this mood, the speaker wants to take an action to happen and it usually use the pronoun "you" yet differs from the first sentence because it does not state a condition.