In order to give direct orders or commands, you need the imperative mood. There are both affirmative and negative commands, which are a little different in thetúandvosotrosforms. When forming the imperative of reflexive verbs, the reflexive pronoun attaches to the end of positive commands, but ...
The imperative mood includes affirmative and negative commands. Note that the verb desear is not used in the imperative form very often, since one usually does not command others to wish something. Therefore, the commands with desear below sound somewhat awkward. Positive Commands Tú desea ¡...