整個句子中,it是形式主語,后面的to have more money to take care of,more begging letters to read,and to be cut off from those delicious Alnaschar dreams in which the poor man,sitting down to consider what he will do in the always possible event of some unknown relative leaving him a fortune,forgets his own situation of being poor?是真正主語.真正主語中包含兩個動詞不定式短語to have more money to take care of,more begging letters to read,和 to be cut off from those delicious Alnaschar dreams in which the poor man,sitting down to consider what he will do in the always possible event of some unknown relative leaving him a fortune,forgets his own situation of being poor.第一個不定式短語 to have more money to take care of,more begging letters to read是主動表被動結(jié)構(gòu),就像我們常說的句子：I have something important to do.一樣,也是主動表被動.第二個不定式短語中包含一個定語從句,先行詞是 dreams,后面的in which the poor man,sitting down to consider what he will do in the always possible event of some unknown relative leaving him a fortune,做定語修飾dreams.在定語從句中,有一個現(xiàn)在分詞短語sitting down to consider what he will do in the always possible event of some unknown relative leaving him a fortune,做伴隨狀語,在這個分詞短語中包含一個賓語從句 what he will do in the always possible event of some unknown relative leaving him a fortune.