Never having seen anything like this style of architecture before,we thought we were looking at giant sculptures,not building.这句为什么用Never having seen ,而不能用 never had we seen

12 _____him before ,I didn't recognize him .A Not seeing B Having not seen C Never having seen D Having never seen是否应把never 放在haveing seen 前面 i have never seen such an interesting film that I have never seen such an interesting film before I've never seen such an interesting film有语病? You have never seen such an exciting film,____you? I have never seen such an animal请翻译 THANKS Never having seen anything like this style of architecture before,we thought we were looking at giant sculptures,not building.这句为什么用Never having seen ,而不能用 never had we seen i have never seen ---------science fiction. such an interesting ; so an interesting such insteresting ;so insteresting. _ from a distance ,the mountain looks like an elephantA seen.B seeing C having seen D having been seeing怎么选?给我讲下 She's never seen an alien.I haven't,either.（改为同义句） She's never seen an alien._____ ______ i have never seen an uglier face.(use i have ever seen)it is one of ( )快 she was a bit nervous as she __her boy friend's parents.A has never seen B didn't seeC had never seen D not having seen为什么选C never having done还是having never done i have never seen such an interesting film that this one is. l have never seen such an interesting film--- So do l 还是Neither do l I'm notsure what to expect becanse i've never seen an Indian film before什么 You have ( ) seen an elephant,have you?A.never B.ever C.yet D.already Having seen her smile是什么意思?