Do use the subjunctive when you're describing your attitude towards something factual, or a fact relating to someone, provided that…
1. There are two verbs in the sentence, with a “que” in between them. ...
The 'person' of the first verb is different to the 'person' of the second verb.
-I demand a car!
1. I demand that you respect me!
2. subject + volition verb + "que" + different subject + subjunctive verb
3. Yo insisto en que ella se vaya
4. Él recomienda que comamos bien
5. Es necesario que tú hagas tu tarea
6. Yo sé que tú haces tu tarea
Therefore it's known as a noun clause. There are three reasons we would use the subjunctive in a noun clause: volition, doubt/negation, and emotion.
Answer:
1. ha estado
2. habían reservado
3. he hecho
4. había llegado
Explanation:
The perfect past tense is a tense used to:
* Talk about actions that have happened a short time ago: Esta mañana he visto a María.
* Talk about actions that we don't want to say when they happened: Antonio ha estado enfermo varias veces.
* With the adverbs still and still: ¿Todavía no has terminado los deberes?
It is formed with the present simple of the verb to have as auxiliary and the participle of the main verb.
