The verb suponer in the past

Question

I have a sentence:

It was supposed to be a good party.

In Spanish, I would say:

Se suponia que iba ser una buena fiesta.

Or maybe:

Se suponia que seria una buena fiesta

Please correct, if any errors.

Answer 1

The sentence:

• It was supposed to be a good party.

is ambiguous in English (the sentences below are not as idiomatic and are solely provided for reference), since it can refer to the past:

1. It was supposed that it was a good party.

or to the future:

2. It was supposed that it would be a good party.

In the first case, you can translate is as follows:

1.a. Se suponía que era una buena fiesta.

In the second case, you can translate it as follows:

2.a. Se suponía que iba a ser una buena fiesta. (Notice there is an "a" missing.)

Or:

2.b. Se suponía que sería una buena fiesta.