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In the room whose window is _____ lives our history teacher.

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In the room whose window is _____ lives our history teacher.
为什么填widely open ..open是做形容词还是动词?如果做动词为什么是主动语态...如果做形容词为什么前面可以用副词?
They told him that they would inform him ____ later.
为什么用some time ,而不用sometime.
1.此处open是形容词,意思是“开着的”.
的确如楼主所言,如果open是动词,前面因为有is,所以就应该用被动的opened.
副词当然可以修饰形容词,如楼上所言,此处widely open意为“大开”.
再如:I'm very happy.
可不就是副词very修饰形容词happy么?
2.some time意思是“一些时间/一段时间”,意指一个时间段.
some time在句中如果难以理解,可以把它换成具体的一段时间如two hours这样的,再代入句中,就很好理解了.
如:I've waited for some time.→I've waited for two hours.
再如:She was here some time ago.→She was here twenty minutes ago.
而sometime的意思是“(在)某个时刻”,它在句中可以单独充当时间状语,指一个具体的时间点.
如:I saw you sometime last month.上个月某个时刻我见过你.
再如:I'll call you sometime tomorrow.明天某个时刻我回打电话给你.