Which of the following sentences is grammatically correct? Reading poems and understanding them has always been easy for me. Reading poems and understanding them have always been easy for me.
In your sentences, you have used a compound subject--reading and understanding. The problem is that subject/verb identification and/or agreement probably isn't quite clear to you. Your subject in both sentences is:
- reading and understanding
This is a compound singular noun subject. Since it is singular, it must take a singular verb, and a singular verb will take the "s" form. A plural noun would take a plural verb, which would not take the "s" form unlike a plural noun which would require an "s" form.
- a dog/barks
- the dogs/bark
So your sentence "Reading poems and understanding them has always been easy for me," would be the correct sentence.