Learn French: Tu te laves et tu t'habilles pour ce soir. - You wash up and get dressed for tonight.

These verbs are reflexive: se laver (to wash oneself) and s'habiller (to dress oneself). Because the subject is tu (you), you must use the reflexive pronoun te to show that you are doing the action to yourself.

Why does the second verb use t' instead of te?

The verb habiller starts with a silent h. In French, a silent h usually acts like a vowel. To make pronunciation smoother, the letter e in te is dropped, creating t'habilles.

This lesson is about commands (the imperative). Is this sentence a command?

No, this sentence is a regular statement in the present tense. If it were a command (Wash up and get dressed!), you would drop the subject tu, drop the final s from these -er verbs, and move the pronoun to the end as toi. The command form would be: Lave-toi et habille-toi pour ce soir !

Why does the sentence use ce soir instead of a specific word for tonight?

French doesn't have one single word for tonight. Instead, you say ce soir, which literally means this evening. The word ce (this) is used because soir (evening) is a masculine noun.