Student or Learner
I'd like to ask whether or not we can use 'I couldn't believe it' instead of 'I can't believe it' as in:
''I couldn't believe how nice the shoes are!'' (= It is not possible that I can believe how nice the shoes are)
Can we use it in the present tense?
No. You'd have to say "I can't believe how nice they are!"
I am not a teacher.