Question

Change the verb to indicate that it was in progress at a time in the past using the correct form of Estar in Blank 1 and correct form of action verb in Blank 2. Ellos esperaban en la fila.

Answer 1

ellos estaban esperando en la fila

Answer 2

Ellos estaban esperando en la fila.

Step-by-step explanation:

We use estaban because is the past form of están and esperando because is the gerund form of esperar. With this two conditions we will get the sentence in progress past tense.