I'll answer the first and last one, which might give you a clue.
We say, "I usually read the newspaper every day". (PS)
We don't say, "I am usually reading the newspaper everyday." (PC)
Would you agree so far?
We say, "I am reading the newspaper now" (PC)
We don't say, "I read the newspaper now". (PS)
Would you still agree?
Have you actually tried using these adverbs in the two sentences and thinking about how they sound, and what they mean?
(Note, I'm assuming that your profile is correct, and that you're a native English speaker).
Write again if you're still having trouble.
Student or Learner