

All English verbs except the auxiliaries use 'DO' to form the interrogative and negative.
REMEMBER : DO + ordinary verb for the interrogative and negative
Note: Exception - When do is itself used as an ordinary verb it must use the auxiliary usage of do in the interrogative and negative forms:
How do you do? Very well, thank you.
What do you do on the weekends? I don't do anything on the weekends.
THE NEGATIVE USING DO: SIMPLE PRESENT
FORM:
SUBJECT+ DO / DOES+ NOT + INFINITIVE OF VERB
I DO NOT LIVE IN SPAIN.
SHE DOES NOTSPEAK ENGLISH.
Example : to like
I like I do not (don't) like you like You do not (don't) like he,she,it likes She does not (doesn't) like we like We do not (don't) like you like You do not (don't) like they like They do not (don't) like Examples:
a. I don't like coffee.
b. They don't like the cold.
c. He doesn't like orange juice.
d. She doesn't like steak.
e. We do not live in Brussels.
f. They do not speak English.
INTERROGATIVE USING DO : SIMPLE PRESENT
FORM :
DO / DOES +SUBJECT + INFINITIVE OF VERB
DO THEY KNOW DAVID ?
DOES HE LIKE FOOTBALL?
Example : to eat
Affirmative Interrogative I eat Do I eat? you eat Do you eat? he, she, it eats Does she eat? we eat Do we eat? you eat Do you eat? they eat Do they eat? Examples:
a. Do they live in an apartment ?
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b. Does she eat meat?
c. Do they like Sally?
d. Does it snow in Australia ?
e. Do Peter and Simon play tennis?
f. Does Roger's mother live in Berlin?
