A：Have you found your keys? B: Not yet. I think I dropped them on the bus.这里的I think I dropped them on the bus.中的dropped和之前的think时态不一致,从语法上分析应该怎么理解?

Have you found your pen( have i found you是 where have you found it? where you have found contact You have found a hidden passage to Hardcore World 1. -()have you lived in shanghai?-Since we ()work here.A.When;have found B.How long;found C.When;have found D.How long;have found Have you found the book?Yes,I____it five minutes_____.A.have found；before B.found ；ago谁知道告诉下! Have you found your bike?Yes,I __ it ten mintues __ A.have found;before B.found;ago heve you ____the book you have been____?A.found ,looking for B.found out,looking forC.found,finding out D.found out ,finding You have found her own happiness是什么意思 have you found your partner是什么意思 改错 Have you found your missed pen I hope you have found this useful have you found that special someone yet? you shuld have put the book where you found it Have you found ( )adderss that you wanted?怎么填 Where have you（ Your mother found you just now. Have you found your lost pen?Yes.I____it under the chair just now.A.found B.will find C.have found请说明原因