undergo的过去式和过去分词形式
过去式 underwent;过去分词 undergone;
undergo
v.经历,经受(变化、不快的事等);
第三人称单数 undergoes;
现在分词 undergoing
The ship has undergone a complete refit.
这条船已经全面整修了。
Two rival laser surgery systems are undergoing clinical trials in the US.
两个相互竞争的激光手术系统正在美国进行临床试验。
only 12 weeks ago he underwent major heart transplant surgery
12个星期前他才刚刚接受了风险很高的心脏移植手术。