10.ответьте на вопросы Past Continuous, используйте сначала краткую форму ответа, a потом полную:
a) Were you going to the theatre at 8 o’clock? Yes
b) Were you having breakfast at 10 o’clock? No
c) Was your friend surfing the Internet when you called him or her? Yes
d) Was your wife or husband reading when you entered the room? No
e) Was your dog barking when somebody knocked? Yes
f) Were the oven and iron working when you left the flat? No
g) Were you running after the bus when the telephone rang? Yes
h) Were you writing an essay at 9 o’clock last morning? No
i) Was your cousin cooking when you were tidying your room? Yes

a) Were you going to the theatre at 8 o'clock?
- Yes, I was.

To form the Past Continuous tense, we use the past tense of the verb "to be" (in this case, "were"), followed by the gerund form of the main verb (in this case, "going"). In a short answer, we only need to use the past tense of "to be," which is "were," and not the gerund form of the main verb.

b) Were you having breakfast at 10 o'clock?
- No, I wasn't.

Similarly, we use the past tense of "to be" ("were") with the gerund form of "having." In a short answer, we just use the past tense of "to be" ("weren't").

c) Was your friend surfing the Internet when you called him or her?
- Yes, he/she was.

In this case, we use the past tense of "to be" ("was") with the gerund form of "surfing." The short answer uses only the past tense of "to be" ("was").

d) Was your wife or husband reading when you entered the room?
- No, he/she wasn't.

Similar to the previous examples, we use the past tense of "to be" ("wasn't") with the gerund form of "reading."

e) Was your dog barking when somebody knocked?
- Yes, it was.

Again, we use the past tense of "to be" ("was") with the gerund form of "barking."

f) Were the oven and iron working when you left the flat?
- No, they weren't.

As before, we use the past tense of "to be" ("weren't") with the gerund form of "working."

g) Were you running after the bus when the telephone rang?
- Yes, I was.

Once again, we use the past tense of "to be" ("was") with the gerund form of "running."

h) Were you writing an essay at 9 o'clock last morning?
- No, I wasn't.

Like the previous examples, we use the past tense of "to be" ("wasn't") with the gerund form of "writing."

i) Was your cousin cooking when you were tidying your room?
- Yes, he/she was.

Just like before, we use the past tense of "to be" ("was") with the gerund form of "cooking."

Overall, when answering questions in the Past Continuous tense, we need to use the past tense of "to be" ("was" or "were") with the gerund form of the main verb. Short answers only require the past tense of "to be," while full sentences use both the past tense of "to be" and the gerund.