PART IGRAMMAR
一、八种基本时态的表现形式和时间对应
过去现在将来
一般diddo / doeswill do / be to do
进行was / were doingam / is / are doingwill be doing
完成had donehave / has done
时间标志时态选择
不强调时间一般现在 do / does
强调过去之前过去完成 had done
强调过去一般过去 did
过去进行 was / were doing
强调过去和现在现在完成 have / has done
强调现在现在进行 am / is / are doing
强调将来一般将来 will do / be to do
将来进行 will be doing
主将从现 do / does
计划性动作 am / is / are doing
二、常规时态题目的解题注意事项
1、句中的时间标志：时．间．状．语．、已．知．动．词．时．态．
2、一般与进行的差别：一般无特殊要求，进行要求精准时间或生动形象的场景感
3、过去将来时 would do 需要过去和将来两个时间，错误率高
4、现在完成进行时 have / has been doing 正确率非常高
三、虚拟语气题目的解题注意事项
1、条件句虚拟
主句从句（if）
与现在将来相反would dodid
与过去相反would have donehad done
标志： would / should / could have done、if（主将从现、虚拟语气） 其它标志：or / otherwise / but for / without ……
方法： 主句一定有 would；从句一定没有 would
与过去相关一定有 have，与现在将来相关一定没有 have
根据空．格．当．前．句．动作时间判断过去或现在将来
2、wish / as if / as though 虚拟3、虚拟语气倒装形式过去相关：had doneHad I = If I had
现在相关：didWere I = If I were
将来相关：would doShould I = If I should
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