Question

Turn into the interrogative and negative form the follow phrases:
a) She cooked dinner last night.
b) I studied english yesterday.
c) They open the computer.
d) Cristina worked all night.
e) ARPAnet created the TCP/IP communications standard.

Answer 1

a) Negative form: She did not (didn't) cook dinner last night;
     Interrogative form: Did she cook dinner last night?;

b) Negative form: I didn't study English* yesterday;
     Interrogative form: Did I study English yesterday?;

c) Negative form: They do not (don't) open the computer;
    Interrogative form: Do they open the computer?

d) Negative form: Cristina didn't work all night;
    Interrogative form: Did Cristina work all night?


Remark*: languages shall be written with a capital initial in English