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Only in the weakest sense. Like one could say that English's dative "case" would be using the words 'to' and such other prepositions that mark the dative cases in other languages. Just like the addition of -'s or -s' can be called a genetive "case".

"Tú" is nominative, "tu" is genitive, "ti" is more accusative than anything (I suppose), and "te" is dative + accusative.

Section 13 - The imperative (command) form

Positive commands

Use these command forms to tell someone what to do in either the tú or usted forms.

Tú - To give a command in the tú form, simply use the él form of a given verb:

¡Limpia tu cuarto! (Clean your room!) {from limpiar - to clean}

Muere! (Die!) {from morir [ue] - to die}

Usted - To give a command in the usted form, use the yo form of a verb, remove the o and add the vowel of the opposite verbal ending (-e if an -ar verb, -a if an -er/-ir verb):

Camine derecho esa calle. (Walk down that street.) {from caminar - to walk}

Venga a Puerto Rico alguna vez. (Come to Puerto Rico sometime.) {from venir [go] - to come}

Negative commands

Use these command forms to tell someone what not to do in either the tú or usted forms.

Tú - To give a negative command in the tú form, follow the positive usted command process as listed above and add an -s:

¡No limpies tu cuatro ahora sino después! (Don't clean your room now, but later!) {from limpiar - to clean}

No mueras! (Don't die!) {from morir [ue] - to die}

Usted - To give a negative command in the usted form, use the same method as the usted positive command, but with 'no':

No camine derecho esta calle. (Don't walk down this street.)

No venga a Puerto Rico tan pronto. (Don't come to Puerto Rico so soon.)

-car, -gar and -zar verbs

Like I explained in Section 9, the letters c, g and z have major issues with the letter e. The same type of spelling changes occur as was explained with these verb endings in the simple preterite - they occur in the positive and negative usted commands, and the negative tú command:

tocar - to touch

Usted: ¡(No) me toque! ((Don't) touch me!)

Tú: ¡No me toques! (Don't touch me!)

jugar - to play

Usted: ¡(No) juegue el fútbol! ((Don't) play soccer!)

Tú: ¡No juegues el fútbol! (Don't play soccer!)

cazar - to hunt

Usted: ¡(No) cace [a] los zorros! ((Don't) hunt foxes!)

Tú: ¡No caces [a] los zorros! (Don't hunt foxes!)

[Using 'a' is optional when talking about animals.]