tell whether these sentences are simple, compound, complex, or compound-complex

the unreliable weatherman predicted sunny skies for the day of the party, so we all prepared for a torrential downpour.

the sky looks as if it would rain all week.

the thunder, lightning, high winds, and pouring rain did not dampen our spirits.

even though we had to move our festivities indoors, we all agreed the party was a success.

the next day, i was delighted to see that spring had arrived; the rain caused an explosion of green buds on all the trees on my street.