he suddenly turned up (to appear, emarge)
There is no idiom "the tide turned over." There is a saying that "the tide turned," but it's not an idiom because you can figure out what it means by thinking. Tides "turn" when they shift from high tide to low tide - the currents either go toward the beach or away from it depending on what tide is coming up. People say "the tide turned" or "the tide will turn" to mean that situations in life are changing, just in the same way that the tides change.
No, the idiom is "turned a blind eye" as in "she turned a blind eye to his suffering." You don't change an idiom around or you lose the meaning.
It means things are trustworthy.
It implies that the corners of your mouth are turned down, which is what can happen if you are sad.
say no to it
To make a mistake
About to be sold, or given up.
To keep struggling and not give up.
pay attention.
flatter her to get something
It means shut up!
to make something stronger ,,