外研版高中英语必修3 全册教案
Step 3: Learning about subject and verb agreement
Basic Principle: Singular subjects need singular verbs; plural
subjects need plural verbs.
For example: My brother is a teacher. My sisters are
mathematicians.
The subject of a sentence must agree with the verb of the sentence.
How do they agree?
They must agree in two ways: in number: singular vs. plural, in person: first, second,
or third person.
We all know these meanings of "agree," but when we talk about subject-verb
agreement; we're talking about something different: matching subjects and verbs
according to number. That is, when you have a singular subject, you have to match it
with a singular verb form: The boy plays
. When you have a
plural subject, you must
have a plural verb form: The boys play.
In short, simple sentences, you should have no problem with agreement. You can hear
the problem: The boys plays. When it's wrong, it just sounds funny.
Step 4: Summarizing subject and verb agreement