he was darn to be an American中的darn有什么作用?

英语短语darn well Darn it里it 是宾语? he seems( to be )an American.这句话中的to be能省略吗?（请英语大仙指示.） There is going to be an American film tonight中的American为什么是主 when he was a boy,he wanted to be an() 英语翻译One an American was in Africa.He wanted to go to a small One an American was in Africa.He wanted to go to a small vil Mark Twain was an American writer.One day he went to a city 英语翻译Mark Twain was an American writer.One day he went to a c There is going to be an American film tonight.中的There is goi He must be American等于什么 英文darn it 老听美国朋友这么说,没那么差吧