China became the 143rd member of the WTO in 2001,thus(realizing)its 15-year wish .如题,为什么不可以用having realized?晤,还有一个,Jose came to borrow my skiing boards yesterday,but it happened that I （lent ）them out.为什么不用have lent?
问题描述：
China became the 143rd member of the WTO in 2001,thus(realizing)its 15-year wish .
如题,为什么不可以用having realized?晤,还有一个,Jose came to borrow my skiing boards yesterday,but it happened that I （lent ）them out.为什么不用have lent?
答
became 与 realize两个动作是同时发生的,先后顺序不明显,故用realizing而不用having realized.
it happened 后的that从句通常用一般过去时,不用完成时.