1. ever / never
ever is used in questions (疑問文) and negative (否定的) sentences.
例えば：
(疑問文) Have you ever gone skydiving? (スカイダイビングはやった事ある？)
Would you ever try eating snake? (もしチャンスがあったら、蛇を食べてみる？)
(否定的な文) This restaurant is too dirty! I don’t ever plan to come back here!
Reika is really angry. She says she doesn’t ever want to speak to me again!
never is used in positive (肯定的な) sentences.
例えば：
(肯定的な文) I never want to speak to you again!
I never plan to get a tattoo.
Oh wow... I like haunted houses, but that one was too scary. I
[ 1 ]_____ want to go back to that one again!
I know, right! I don’t [ 2 ] _____ want to do that again!

2. Have you [ 1 ]_____ thought about studying abroad? No, I [ 2 ]_____
really wanted to. I don’t want to give up my life in Japan. I [ 3 ]_____
thought I would want to live overseas either, but lately I’ve kind of changed
my mind... Now is a good chance, before we start work at a company. Where
do you want to go? I think maybe Australia. Have you [ 4 ]_____ been?
No, I’ve [ 5 ]_____ had a chance to go. It looks like it would a a really fun
place to visit though! Would you [ 6 ]_____ consider coming to visit me if I
went there to study abroad? Of course! I [ 7 ]_____ said I wouldn’t like
to visit. Maybe I can come stay with you during Spring Vacation. Sounds
good!