Question

6．If I __________ it with my own eyes，I wouldn't have believed it．（　�。�

• A． didn't see
• B． weren't seeing
• C． Wouldn't see
• D． hadn't seen

Answer 1

分析 如果我沒(méi)有親眼所見(jiàn)，我是不會(huì)相信的．

解答 答案：D．根據(jù)題干中主句的謂語(yǔ)動(dòng)詞wouldn't have believed 為"would have done"結(jié)構(gòu)可知，本句是對(duì)過(guò)去情況的假設(shè)，由此可推知，從句if引導(dǎo)的虛擬條件句中的謂語(yǔ)動(dòng)詞應(yīng)用had done來(lái)表示對(duì)過(guò)去情況的假設(shè)，故選D．

點(diǎn)評(píng) 此題考查if條件句中虛擬語(yǔ)氣的用法．if條件從句的虛擬情況有三種形式：①如對(duì)現(xiàn)在情況假設(shè)：if條件從句的謂語(yǔ)動(dòng)詞形式為過(guò)去式（be為were），主句的謂語(yǔ)動(dòng)詞形式為would/could/might/should do②如對(duì)過(guò)去情況假設(shè)：if條件從句的謂語(yǔ)動(dòng)詞形式為had done，主句的謂語(yǔ)動(dòng)詞形式為would/could/might/should have done ③如對(duì)將來(lái)情況假設(shè)：if條件從句的謂語(yǔ)動(dòng)詞形式為were/did；should do；were to do，主句的謂語(yǔ)動(dòng)詞形式為would/could/might/should do．解此類題的關(guān)鍵是要判斷對(duì)什么時(shí)間的假設(shè)，再而確定謂語(yǔ)動(dòng)詞的正確形式．