help me (to) do
Hello,
Could someone explain to me when we add "to" in this phrase:
he help me (to).
Could we say:
More saliva, in turn, helps them (to) feel fuller.
John helped me (to) do my homework.
She did everything to help her son (to) succeed in life.
Is there a specific grammar rule that tells us when to use "to" after "help me"?
Thank you! 😮