The dinner party was a success,but we thought it was a pity not__ you.为什么选to have invited而不是to invite ,顺便补充一下语法知识,
问题描述：
The dinner party was a success,but we thought it was a pity not__ you.为什么选to have invited而不是to invite ,顺便补充一下语法知识,
答
因为主句是was a success,这是过去时态,说明party已经举行完了.所以应该用过去完成时.
又因为to后用动词原形,所以had invited 改成 have invited
to invite是不定式,表示将来.（这里是过去,不是将来）