人教版高中英语选择性必修第一册知识点(20)

on end 竖着；连续地
as though (= as if)好像；仿佛
which引导非限制性定语从句，对long white hair进行补充和说明。同时从句中又含有as though引导的方式状语从句。
as if/though从句用陈述语气：
从句表示的情况是真实的或极有可能发生的
as if/though从句用虚拟语气:
①从句用一般过去时(与现在的事实相反)
②从句用过去完成时(与过去的事实相反)
③从句用would /could/might do形式(与将来的事实相反)
42. Although he was a genius, he sometimes forgot things, like his friends’ birthdays.虽然他是个天才，但他有时会忘记一些事情，比如朋友的生日。
although引导让步状语从句，although (though)不和连词but连用，但可以和yet, still等副词连用。
Although I was only six, I can remember seeing it on TV. 虽然那时我只有6岁，我依然记得在电视上见过它。
43. There is even a story about how he helped a little girl who knocked on his door and asked for help with her homework. 甚至还有一个故事，讲的是他如何帮助一个小女孩，这个女孩敲了他的门，要求帮助她做家庭作业。
knock on 敲击(门、窗)；撞击
He went up the garden path to knock on
the door. 他穿过花园小径去敲门。
ask for help 寻求帮助；求助；请求帮助
Mr Spero was reluctant to ask for help.
斯佩罗先生不愿意寻求帮助。
44. Always I am mistaken for Professor Einstein! 我总是被误认为是爱因斯坦教授!
be mistaken for 被误认为……；被误解为……