30. escribe esta frase como imperativo. tu eres simpatico.

The imperative is used when telling someone to do something in a direct manner, that is, sentences in the imperative mood are commands. So we need to write the sentence tú eres simpático in the imperative mood. Therefore, we need to remove the subject pronoun tú and change the conjugation of the verb ser from eres to se. Finally:

Se simpático means be nice

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when the outside temperature is too cold, an endothermic animal can generate heat by shivering. endothermic animals must eat much more often than ectothermic animals since it takes energy to maintain a constant body temperature.