is there any rule in Englishthat if the subject of the sentence is plural we should make the verb in singular
eg she likes to read
and pine trees grow in this forest

Yes, the rule of English grammar states that a singular subject will have a plural verb

• The mouse eats cheese.

A plural subject will have a singular verb:

• The horses gallop across the courtyard every morning.

Two singular subjects connected by or, either/or, or neither/nor  require a singular verb

• My uncle and aunt will arrive today.

Two or more singular subjects require a plural verb

• My uncle and aunt are coming to visit us.