Question

2．除非你親眼看見，不然你想象不出地震有多可怕．You can't imagine how terrible an earthquake is unless you see it with your own eyes．．

Answer 1

分析 You can't imagine how terrible an earthquake is unless you see it with your own eyes．

解答 答案：You can't imagine how terrible an earthquake is unless you see it with your own eyes．表示除非用unless引導(dǎo)的條件狀語從句，主句是你想象不出地震有多可怕，主語You，用情態(tài)動詞can的否定式can't表示不能，后加動詞原形imagine想象，后加上感嘆句作為賓語從句，可怕的terrible是形容詞，故用how來修飾，結(jié)合感嘆句的句型How+adj/adv+主語+謂語！故how terrible an earthquake is．主句含有情態(tài)動詞，從句用一般現(xiàn)在時代替一般將來時，從句是除非你親眼看見，主語是you，看見see it，用自己的眼睛with your own eyes．故答案是You can't imagine how terrible an earthquake is unless you see it with your own eyes．

點評 if或unless引導(dǎo)的條件句使用如下：
1．主語用一般將來時，從句用一般現(xiàn)在時表將來；
2．主句一般現(xiàn)在時或含情態(tài)動詞can，may，must，should等，從句一般現(xiàn)在時；
3．主句為祈使句，從句也常用一般現(xiàn)在時