2. you (ты) doing the ironing at this time yesterday? — Yes, you / No, you

2. you (ты) doing the ironing at this time yesterday? — Yes, you / No, you

Согласно грамматике английского языка, необходимо вставить вспомогательный глагол перед подлежащим, чтобы образовать вопрос в Past Continuous (прошедшее продолженное время).

В данном случае, подлежащее - you, поэтому используем вспомогательный глагол were.

you doing the ironing at this time yesterday? - Were you doing the ironing at this time yesterday?

Yes, you / No, you - Yes, you were / No, you weren't.

Ответ: Were you (ты) doing the ironing at this time yesterday? — Yes, you were / No, you weren't