When to use "to" in a sentence.
Dear fellow English speakers. Please help me understand why the following sentence is incorrect:
"Help grandma to build a house"
I believe it should be "Help grandma build a house", but I'm not sure how to explain the rule that determines this. I know that "to" should be used to indicate an infinitive verb, but not sure why the above cannot be considered an infinitive phrase (or can it?). Likewise, I don't know why "Help grandma build a house" is correct, I just know that it is...or is it? :)
Any ideas?
Cheers!