1. If it had not been for your selfless and continuous help,I fear that I would have failed my final examinations.
如果没有你无私和持续的帮助，我的期末考试恐怕是通不过的。
(1) 与过去事实相反的虚拟假设，从句--have done 主句--would have done
2. Were there more people like you, this world would be a better place to live in.
如果有更多人像你一样的话，这个世界将变成更美好的地方。
(1) 与现在事实相反的虚拟假设，从句谓语--were 主句--would be
(2) 如果从句谓语中含 had were should ,则可将if省略，然后将had were should 移至句首形成倒装。
(3) 还原：If there were more people like you, this world would be a better place to live in.