问题描述:
我在这次旅行前没有看见过山
问题解答:
I haven't seen any mountains before (I took) this trip.
I HAVEN'T SEEN ANY MOUNTAINS BEFORE THIS TRIP
I haven't seen any moutains before this trip
I have no opportunity to see mountains before this trip.
I've never seen a mountain before this trip.
I didn't see any mountains during the trip.