Adverbial Clauses (Ver)
Why is this sentence incorrect? Focusing on (ver), i think this is how it should be conjugated: Él se preocupará por el calentamiento global después de vea con sus propios ojos lo que ocurre." However, the homework says this is incorrect.
1 Answer
después de ver..... You would used the infinitive after the preposition. It usually functions as a noun, many times a gerund.
...after [seeing with his own eyes what is happening.] [noun clause]
If you want to conjugate the verb you need to do so in a subordinate clauses beginning with a relative pronoun...que vea con sus propios ojos...but you can't use one after the prepositional phrase.