Answer:
1) estan (accent on the "a")
2) son
3) esta (accent on the "a")
Explanation:
1) You're using the "they" form, so add "an" after removing infinitive ending
2) When using this translation of "to be", you're talking about WHAT something is rather than HOW something is
3) In this case, the rain (which would be "it") would need the verb to be in its he/she/it form, therefore, use "esta" since it's the appropriate conjugation
(3rd explanation might be a little shaky, sorry about that)
Hope this helped!
