英语倒装句的疑问!He said only in this way could he provide for his b

你的句子结构是：
1 He said that 1 only in this way could he provide for his big family.
and
2 should he have another chance,he would not do this again.
也就是说,你的句子是宾语从句.he said that 1
he said that 2
he said的后面加了两个陈述句1 和2 .你的第一个陈述句省略了that,所以,第二个that就成了选项.第二个陈述句也可以写成：if he should have another chance,he would not do this again.----------he said that if he should have another chance,he would not do this again.