What's the subject of the sentence the computer me do my homework

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

not exaxtly

explanation: it depends on the situation like if u do something good there will be good consequences which arent punishments but if you do somthing bad there will be bad consequences which are punishements.