Did you swim across the river Have you swam across the river?这两句话有什么区别

Did you swim across the river Have you swam across the river?这两句话有什么区别 Did you swim across the river last week?为什么不用现在完成时?上句出自新概念第一册90课原文Did you swim across the river last week?Yes,I swam across the river last week.What about Ron and Betty?They haven't swum across the river Did you go________(swim) last sunday Hao long did you swim?(改成现在完成时) 用swim across造句 swim ( )填across还是through Can you swim ( ) the river?A near B between C from D across 选什么? Except you,who is also unable to swim across my love 问几道英语单选题1.It is amazing that the little boy can swim ______the river _____100 meters wide.A.across measuringB.across measure2.--Jack,how did it ____ that you made so many mistakes in your homework?--I myself haven`t figured it out yet Did you enjoy yourself _____ last year?应选（ ） A swiming B swimming C swim D to swim Can you imagine _____ the river? A. me to swim c. me swimming across D. I swim 原因 B. my swimming不用排除法. go to swim和 go swiming的区别what time did you go swimming yesterday? 能说成what time did you go to swim yesterday吗? swim across the river还是swim cross the river? 穿过海用Swim across还是swim though? 游泳swim应该用across还是through The river is about 20 meters wide.Can you swim ______ it?A.to B.along C.through D.across DId you enjoy_____ (swim) in the last summer适当形式填空 Did you go swimming的swim要加ing吗?急.