We got there just as the shop was ____________ (closed / closing)
We got there just as the shop was closed / closing. The expression "just as" implies that the closing was in progress, hence the progressive aspect "was closing" is appropriate here. If you drop the "was" to give "just as the shop closed", that would be fine too, though it implies that you got there a little later than you did when it was 'just closing'.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
We got there just as the shop was closed / closing.
The expression "just as" implies that the closing was in progress, hence the progressive aspect "was closing" is appropriate here.
If you drop the "was" to give "just as the shop closed", that would be fine too, though it implies that you got there a little later than you did when it was 'just closing'.