Question

She was
washing
the clothes. Interrogative​

Answer 1

Answer:

interrogative :- interrogative sentence is used to ask the question. and it ends with a question mark(?).

examples:- who are you? etc.

according to your question:-

She was washing the clothes.

interrogative:- Who was washing the clothes?

Answer 2

Answer:

Was she washing the clothes ?

This is an interrogative sentence because in an interrogative sentence there must be a question mark at the end