___they___(paint) the walls when your mother ___(come) in?Задание (Откройте скобки для

Were they painting the walls when your mother came in?

The first part of the sentence is Past Continuous (were painting). The second part of the sentence is Past Indefinite (came).

Past Continuous is formed with the help of the second form of the auxiliary verb to be was (for singulars) and were (for plurals).

And we add the suffix ing to the verb. (painting).

Past Indefinite is formed with the help of the suffix ed for regular verbs (wash washed) and we use the second form of the irregular verbs (come came).