shouldhavebeen和shouldbe有何区别（1）Ilookedatthemapandthenatthemilometer.Ihadcometenmilessinceleavingthetown,andatthispoint,accordingtomyfather,ishouldbelookingatfarmsandcottagesinavalley...（2）Ilooked

　　shouldhavebeen和shouldbe有何区别

　　（1）Ilookedatthemapandthenatthemilometer.Ihadcometenmilessinceleavingthetown,andatthispoint,accordingtomyfather,ishouldbelookingatfarmsandcottagesinavalley...（2）Ilookedatthemapandthenatthemilometer.Ihadcometenmilessinceleavingthetown,andatthispoint,accordingtomyfather,ishouldhavebeenlookingatfarmsandcottagesinavalley...这两句话区别在哪里?ItwasherethatmyfatherhadtoldmeI______farmsandcottages…a．couldseeb．wouldseec．wouldbeseeingd．shouldhaveseen这道题是不是4个答案都正确?如果是,又或者只是其中的两三个选项正确,那么他们之间有什么区别?