1. You're not allowed to go out after 7pm. PERFECT You can also just say "You're not allowed out after 7pm." Both are fine and mean the same thing. You can omit "to go" as it's implied/understood when you're speaking casually.  2. Those things are not allowed to carry on the plane. -> Those things are not allowed on the plane. Those things are not permitted on the plane. Those things can't be brought on the plane. Those things are not allowed/permitted (to be brought/stored) in carry-on on the plane. (carry-on is a specific type of luggage and section of storage in the passenger section of a plane)            3. Harry was not allowed to have a question of how his parents passed away. -> Harry was not allowed to question how his parents passed away. ("to question" is a verb itself. "allowed to have a question of how" sounds very strange/unnatural) 'Harry was on the point of unfolding his letter, which was written on the same heavy parchment as the envelope, when it was jerked sharply out of his hand by Uncle Vernon' -> Harry was on the verge of unfolding his letter, (the rest is correct and natural) OR Harry was finally at the point of unfolding his letter, on the verge of = just about to do something, sounds intense/suspenseful, often followed by an interruption (ex. He was on the verge of discovering the killer, when suddenly he got a call that his family had been kidnapped and was being held hostage. / She was on the verge of tears. / They were on the verge of an incredible scientific breakthrough!) finally to the point / finally at the point / finally reach that point (exact variation depends on the sentence) -> everything has led up to this moment and at last it's happening "We're finally to / at the point in our presentation where we can have some fun and do a group activity together." (you could also say "part" in this case) "I've finally reach the point in the book where Sarah gets murdered!" (you could also say "part" in this case)

Woohoo!

"Get bruised" means "become bruised". You'll have to look up an image of a "bruise". "Get on the field" is pretty literal - going onto a sports field to play sports. So basically, "If you don't want to get hurt, you shouldn't play sports." (Or whatever specific field sport that is being referenced, such as American football, football, or rugby.)

Also not a native speaker, but as another person said 알다 + honorific (으)시 becomes 아세요. This is because of a spelling change where ㄹ before ㅅ is sometimes dropped. Here's another example: 살다 -> 사세요 To live -> lives (honorific)

물은 comes from 묻다 which means to ask :) 물은 is the adjective form

= is there no end to your hidden talents = you have A LOT of hidden talents. Wow.

I suggest getting your Chinese and Spanish both to B1 or B2 (intermediate, conversational) before adding in a 3rd target language.