However, there is a difficulty. The following two sentences are identical in meaning:
- Our children planted a tree.
- A tree was planted by our children.
Only in the first sentence is our children the grammatical subject. So there is a difference between the logical subject and the grammatical subject.p996 Also, many sentences have no subject, for instance:
- Come here!
- Identifying the thief may take some time.
If a sentence does have a subject, then the rest of the sentence may be called the predicate.
- McArthur, Tom (ed) 1992. The Oxford companion to the English language. Oxford University Press.