When to look for possible survivors and rescue them after a huge
earthquake hit the island of Taiwan in the year of 1999, the
Taiwanese government sent troops, and helped organize volunteers
from all over the world to go into the region and perform rescue
missions.
前面部分
When to look for possible survivors and rescue them after a huge
earthquake hit the island of Taiwan.
虽然看得懂
但还是有点疑惑，以When 开头 但马上接to look
那主词是?
还是说英文句子可以没主词?

1.动词单复数变化完全依主词而定，与受词无关，也就是无需管their money。Each+N当主词用的时候，代表每一个个体，后面动词用单数，all+N当主词用的时候，可代表所有每个个体如何，也可代表单一全体如何，依前后语意而定，也就是后面动词可用单数亦可用复数，语意不同。对不起，上面推文贴错位置

主词似乎在第二句台湾政府

同楼上 因和第二句主词相同而省略了.When (gov was) to