could you tell me (what it is)that prevents her from being as happy as before这句啥意思?为啥不how
问题描述：
could you tell me (what it is)that prevents her from being as happy as before这句啥意思?为啥不how
how it is?
答
你能告诉我什么让她不像从前一样开心吗?
(what it is)that prevents her from being as happy as before 这句中有强调句型,what 作句子主语.