I was typing something, and found my grammer tool correcting me on the following sentence –
They makes a nice couple.
The correct sentence suggested was –
They make a nice couple.
When googled more on it I found that – Subjects and verbs must agree in number. If the subject is singular, the verb must be singular too. And if the subject is plural, the verb must also be plural.
Now that added more to my confusion, I thought verbs ending with “s” should be considered plural and not ending with “s” should be singular.
Some more examples –
Incorrect: She write every day.
Correct: She writes every day.
Incorrect: They writes every day.
Correct: They write every day.
Incorrect: He fix the car when it break down.
Correct: He fixes the car when it breaks down.
And then, why I love you is correct and not I loves you is incorrect, when "I" is also singular, as "He" and "She"?