Robert lives in an apartment.
Subject: Robert
Verb: lives
Place: in an apartment
He loves his job.
Subject: He
Verb: loves
Object: his job.
His wife teaches college courses.
Subject: His wife
Verb: teaches
Object: college courses
They work in the mornings.
Subject: They
Verb: work
Time: in the mornings.
I have learnt that verb is the most important part in the sentence. I can leave out many parts to complete a sentence.