It was not until liberation that _________ to his hometown. 为什么不用did he return ?

问题描述:

It was not until liberation that _________ to his hometown. 为什么不用did he return ?

因为只有否定词放在句首的时候才会用倒装,比如,这句话改成这样就是倒装了:
Not until liberation did he return to his hometown.