一篇文章中的时态不要求一致吗?大家帮我看看新概念63课的.Lesson62Afterthefire大火之后Firemenhadbeenfightingtheforestfirefornearlythreeweeksbeforetheycouldgetitundercontrol.Ashorttimebefore,greattree
一篇文章中的时态不要求一致吗?大家帮我看看新概念63课的.
Lesson62Afterthefire大火之后
Firemenhadbeenfightingtheforestfirefornearlythreeweeksbeforetheycouldgetitundercontrol.Ashorttimebefore,greattreeshadcoveredthecountrysideformilesaround.Now,smokestillroseupfromthewarmgroundoverthedesolatehills.Winterwascomingonandthehillsthreatenedthesurroundingvillageswithdestruction,forheavyrainwouldnotonlywashawaythesoilbutwouldcauseseriousfloodsaswell.Whenthefirehadatlastbeenputout,theforestauthoritiesorderedseveraltonsofaspecialtypeofgrass-seedwhichwouldgrowquickly.Theseedwassprayedoverthegroundinhugequantitiesbyaeroplanes.Theplaneshadbeenplantingseedfornearlyamonthwhenitbegantorain.Bythen,however,inmanyplacesthegrasshadalreadytakenroot.Inplaceofthegreattreeswhichhadbeengrowingthereforcenturies,patchesofgreenhadbeguntoappearintheblackenedsoil.
第4行从Nowsmokestillroseupfromthewarmgroundoverthedesolatehills.为什么用NOW呢?而且后面还是过去式roseup呢?