Fill in with past perfect simple or past perfect continuous. when i entered the house something smelt awful. someone (1) ……… (cook) and (2) ……… (burn) the meal. i (3) ……… (visit) the house once before and (4) ……… (meet) the family, but i didn’t know what (5) ……… (happen) since then. the house was a mess. the children (6) ……… (play) in the living-room and (7) ……… (leave) their toys all over the floor. someone (8) ……… (leave) all the windows open. it (9) ……… (rain) for hours and all the curtains (10) ……… (get) wet and dirty. i asked the children where their parents were. they told me that their mother (11) ……… (be) in hospital for the past two weeks. their father (12) ……… (look after) them since then. obviously he (13) ……… (do) his best, but he couldn’t do any better since he worked all morning and had to leave them alone most of the day. i had to do something to help them.

Here are the correct forms for the text: When I entered the house something smelt awful. Someone (1) had been cooking and (2) had burnt the meal. I (3) had visited the house once before and (4) had met the family, but I didn’t know what (5) had happened since then. The house was a mess. The children (6) had been playing in the living-room and (7) had left their toys all over the floor. Someone (8) had left all the windows open. It (9) had been raining for hours and all the curtains (10) had got (or had gotten) wet and dirty. I asked the children where their parents were. They told me that their mother (11) had been in hospital for the past two weeks. Their father (12) had been looking after them since then. Obviously he (13) had been doing his best, but he couldn’t do any better since he worked all morning and had to leave them alone most of the day. I had to do something to help them. Explanation of choices:

• Past Perfect Continuous (1, 6, 9, 12, 13): Used for ongoing actions that were happening leading up to the moment in the past, especially when the focus is on the duration or the visible results (smell, mess, wet curtains).
• Past Perfect Simple (2, 3, 4, 5, 7, 8, 10, 11): Used for completed actions that happened before another point in the past, or for state verbs (like "be") that do not usually take the continuous form.

Would you like to review the specific grammar rules for distinguishing between these two tenses?