There is a slight error in the title of this question :)
Instead of ‘if my dad would let me’, it’s ‘had my dad let me (remember this useful phrase ending). This is because you can’t have a double ‘would’ in the same phrase.
Answer:
with
Explanation:
because with is a preposition.
Counteract it is.
Definition: do opposing action in this case fight the disease
Answer:
You can correct this by rewriting the sentence as it is listed in the opening paragraph, or you can reconstruct it so that "it" serves as the subject for all three phases: When you come across faulty parallelism, it clangs off the ear, it destroys written sentences, and it muddies any intention the author may have had.
Explanation:
hope this helps