after 后面要加名词,但是为什么"after close examination"的close不用变closing.

after 后面要加名词,但是为什么"after close examination"的close不用变closing. close,closing,closed的区别 close closing closed的区别 英语问题之after为什么刚才的after后面不用过去完成时,而直接hear加ing close closely closed closing的区别 close,closed,closely,closing的区别 closing与to close的区别 close\hike名词形势与closing\hiking怎么区分 close的名词是什么 close,after,remember,to,school,door,the this may have been close to the truth这个have been后面为什么加close原 有些及物动词`为什么后面还要加介词?如:close up