Although Mrs. Mallard's hear trouble appears to refer only to a physical condition, her true trouble is that, despite the fact that she is married to a good man, she is unhappy because she does not feel free. In this sense, it is symbolic of the unease that this lack of independence brings her. Also, the mention of her heart condiion at the beinning ofthe paragraph anticipates her eventual death. At first, the reader might think that it is the news of her husband's death that will cause Mrs. Mallard's own decease, but what triggers her heart attack is the revelation that the news were false, and that she has lost all the freedom that she had just begun to envision.
The predicate of a sentence is the part that modifies the subject in some way. Because the subject is the person, place, or thing that a sentence is about, the predicate must contain a verb explaining what the subject does and can also include a modifier.
I believe "You will eat lunch / at school / with friends" most clearly develops an argumentative tone because of the 'will'. Sounds like someone's trying to force the person to do that and the person may try to argue back because the will makes it sound like they have no choice in the matter.
