虚拟语气( Subjunctive Mood)1
if (条件状语从句)从句谓语( if )主句谓语形式例句与现在事实相反did/were would/could/should/might+do If I were you,I should study English
与过去事实相反had done would/could/should/might+have done If you had taken my advice,you wouldn’t have failed in the exam
与将来事实相反①did ②should do ③were to do would/could/should/might+do If it were to rain tomorrow, the meeting would be put off
主、从句时间不一致,动词形式要根据它所表示的时间来调整
:If I had worked hard at school,I would be an engineer,too
“were,had,should + 主语”放句首(否定词not 不能放前面)
: ①Were I in school again,I would work harder
②Had you been here earlier,you would have seen him
③Should there be a meeting tomorrow,I would come
注意: Were it not for the expense,I would go to Italy
(√) Weren’t it for the expense,I would go to Italy
(×)常用词:①介词:with,without,but for( 要不是,如果