PLEASE ANALYSE THESE ENGLISH SENTENCE!
1.Even Hilton Hotels has shown interest in the space tourism industry and the possibility of building or co-funding a space hotel.
co-funding a space hotel 不是很奇怪吗?"co-funding" is not an adjective or a verb
2.Some amount of delusion is probably part of the human condition.
what does the sentence mean?in particular the meaning of "human condition"
3.He was haunted by memories of his unhappy childhood well into his adult life.
what is the signification of "well into"?
4.I received a letter of complaint from them,but the letters of the sign were made obscure by rain.
the sign were made obscure by rain 分析下结构～
5.my theory applies to you and by analogy to others like you
a couple 是单还是复?the new couple "are" or "is"?