Examples of compound subjects are, "By degrees Rip's awe and apprehension subsided;" "The name of the child, the air of the mother, the tone of her voice,—all awakened a train of recollections in his mind."
Sentences with compound predicates are, "The company broke up, and returned to the more important concerns of the election;" "He shook his head, shouldered the rusty firelock, and, with a heart full of trouble and anxiety, turned his steps homeward."
Sentences with compound objects of the same verb are, "He caught his daughter and her child in his arms;" "Voyages and travels I would also have."
And so with complements, modifiers, etc.
Logical Subject and Logical Predicate.
354. The logical subject is the simple or grammatical subject, together with all its modifiers.
The logical predicate is the simple or grammatical predicate (that is, the verb), together with its modifiers, and its object or complement.
Larger view of a sentence.
It is often a help to the student to find the logical subject and predicate first, then the grammatical subject and predicate. For example, in the sentence, "The situation here contemplated exposes a dreadful ulcer, lurking far down in the depths of human nature," the logical subject is the situation here contemplated, and the rest is the logical predicate. Of this, the simple subject is situation; the predicate, exposes; the object, ulcer, etc.