would, was going to and past continous
When my father bought that painting, he didn't know that the artist ______ become famous
When my father bought that painting, he didn't know that the artist would become famous
Play (Arrengement in the past)
was/were/wasn't/weren't playing...
I waved good bye to my parents from the train window. I wasn't having/wouldn't have much fun on the trip, but of course I didn't know that at the time.
wouldn't have
Bonus
Bonus (you add the points without answering anything)
buy a house (plan in the past)
was/were/wasn't/weren't going to buy a house...
We were going to share/would share an apartment when we left college, but our plans didn't work out.
were going to share
I didn’t want a full-time job because I (start) university in the autumn.
I didn't want a full-time job because I was going to start university in the autumn
pay with my credit card (prediction in the past)
would pay with my credit card
was/wasn't/were weren't going to pay with my credit card
It was clear that any vacation that summer was going to cost/was costing more than we could afford.
was going to cost
He gave me Tracy's birthday present because I (see) her the next day for lunch
He gave me Tracy's birthday because I was seeing her the next day for lunch
have a lot of money (prediction made in the past)
would have a lot of money
was/wasn't/were weren't going to have a lot of money
I had to refuse Callum's invitation because I would see/ was seeing a movie with Millie that night.
was seeing
When I first met Fiona, I had no idea that the encounter (change) my life forever
When I first met Fiona, I had no idea that the encounter would change my life forever
go shopping (Arrangement in the past)
was/were/weren't/wasn't shopping
How could she ever pay for it? It would take/was taking her three years to save that kind of money!
would take