Terms for subject Proverb containing it would be

English	Russian
it would be funny, if it weren't so sad	все это было бы смешно, когда бы не было так грустно ('More)
it would've been nice to be in paradise, but many a sin doesn't let me in!	и рад бы в рай, да грехи не пускают
it would've been nice to be in paradise, but many a sin doesn't let me in!	рад бы в рай, да грехи не пускают
used to mean: you'll never overcome that obstacle, it's too big for you you can't knock down a wall with a pea-shooter	лбом стену не прошибешь
used to mean: you'll never overcome that obstacle, it's too big for you you can't knock down a wall with a pea-shooter	лбом стенку не прошибешь
used to mean: you'll never overcome that obstacle, it's too big for you you can't knock down a wall with a pea-shooter	лбом стены не прошибешь