Next, let's look at other differences between does and do:
1. (verbs and basic forms of verbs in the third person singular) "does" is a verb based on the third person singular form, while "do" is the basic form of verbs, covering the singular and plural forms of all people.
For example:
-She does yoga every morning.
She does yoga every morning.
-We don't need to worry.
We don't need to worry.
(affirmative or negative sentences vs general questions) "Do" is used for general questions and negative sentences, and "Do" is used for affirmative sentences and general questions.
For example:
-Does he work in the city?
Does he work in the city?
-I don't like coffee.
I do not like coffee.
3. (interrogative word +Do vs does) interrogative word +Do is often used to form special interrogative sentences, while interrogative word +does is rarely used.
For example:
-What do you like to do in your spare time?
What do you like to do in your spare time?
-Where does she work?
Where does she work?
In the present continuous tense, "Do" is used as an auxiliary verb, followed by the verb -ing and "Does" used in the third person singular.
For example:
-I'm doing my homework now.
I am doing my homework.
-She has nothing special this weekend.
She has nothing special to do this weekend.
In stressed sentences, does is used to emphasize the performer of the action, and do is used to emphasize the action itself.
For example:
John really loves Mary.
Emphasize that John's love is sincere.
-I write for a living.
Emphasize that my writing depends on my life.
6. (Conditional Sentence) In conditional sentences, do is used in the if leading sentence, and do can be used in all conditional sentences.
For example:
If he doesn't come, we won't wait for him
If he doesn't come, we won't wait for him
If I do my homework, I will go to the movies.
If I finish my homework, I will go to the movies.