1. Correct answer:
No respires
The most common word we use the negate a statement is no. Commands are part of the imperative mood. So we need to conjugate the verb respirar in the imperative mood. If the sentence is affirmative, we just say respira as a command, since the sentence is negative, then the command is:
No respires
2. Correct answer:
No leas
In this sentence, we have the verb leer that means to read. So we need to conjugate the verb leer in the imperative mood. If the sentence is affirmative, we just say lee as a command that matches the tú form, since the sentence is negative, then the command is:
No leas
3. Correct answer:
No hables
In this sentence, we have the verb hablar that means to speak. Hence we need to conjugate the verb hablar in the imperative mood. If the sentence is affirmative, we just say habla as a command that matches the tú form, since the sentence is negative, then the command is:
No hables
4. Correct answer:
Pon
Unless the previous sentence, we use the affirmative form here. Furthermore, we need to conjugate the verb poner matching the second person singular tú, that is, we must use the tú command. Therefore, pon is the conjugation of the verb poner that matches tú in the imperative mood.
5. Correct answer:
Sea
The verb ser has several uses. So we use this verb to talk about permanent or lasting attributes. In this way, this verb stands for descriptions, occupations, characteristics, time, origin and relationships. So we just say sea when using the affirmative tú command of the verb ser.
6. Correct answer:
Sal
We also use the affirmative form here. Furthermore, we need to conjugate the verb salir matching the second person singular tú, that is, we must use the tú command. Therefore, sal is the conjugation of the verb salir that matches tú in the imperative mood. It's important to say here that all the commands above are given in informal form because the subject pronoun tú is the informal form of the second person singular.
