One more thing. Shall can be used interchangeably with "will", but is less common. Most people say "will" over "shall." Shall can be used in questions, but is uncommon. "Shall you return?"

@Ariana : Thank you so much for your comment and information :)

Will: A person is going to do (verb.) I will go now. Will you take this? Would: A person is thinking about doing (verb.) I would, but I can't. He wouldn't do that. Should: A person is expected/suggested to do (verb.) OR (noun)/(adjective) is expected/suggested. You should get home at 7PM. It should be pretty. Shall: Same as "will", but can only be used to talk about what you(speaker) will do. I shall return at night. OR I will return at night.