FORMULA
| + | - / ? |
| V2 | did + V |
FORM
Affirmative sentences (+): V2
| S | V2 | |
| I | V2 | I worked / wrote |
| We | V2 | We worked / wrote |
| You | V2 | You worked / wrote |
| They | V2 | They worked/ wrote |
| He | V2 | He worked / wrote |
| She | V2 | She worked / wrote |
| It | V2 | It worked / wrote |
Negative sentences (-): did + NOT + V
| S | did | not | V |
| I | did | not | work / write |
| We | did | not | work / write |
| You | did | not | work / write |
| They | did | not | work / write |
| He | did | not | work / write |
| She | did | not | work / write |
| It | did | not | work / write |
did not = didn't
Interrogative sentences (?): (QW) + did + S + V … ?
| (QW) | did | S | V | "what / where / when" | ? |
| Did | I | work / write | ? | ||
| Did | we | work / write | ? | ||
| Where | did | you | work / write | last year | ? |
| When | did | they | work / write | in New York | ? |
| Did | he | work / write | yesterday | ? | |
| Why | did | she | work / write | ? | |
| Did | it | work / write | two days ago | ? |
Short answers:
Yes, S + did.
No, S + didn't.
Yes, | S | did. | No, | S | didn't. | |
Yes, | I | did. | No, | I | didn't. | |
Yes, | we | did. | No, | we | didn't. | |
Yes, | you | did. | No, | you | didn't. | |
Yes, | they | did. | No, | they | didn't. | |
Yes, | he | did. | No, | he | didn't. | |
Yes, | she | did. | No, | she | didn't. | |
Yes, | it | did. | No, | it | didn't. |
NOTE!
In short answers we use personal pronouns (I, we, you, they, he, she, it).
E.g.
— Did Oscar play computer games yesterday?
— Yes, he did.
(Not: Yes, Oscar did.)
***
V — Verb (the infinitive of the verb without "to"/ Present Simple verb (for I, we, you, they). E.g. write, go, listen, etc.