only by引导的倒装句和时态

only by引导的倒装句和时态？

1，only by doing 常和将来时will 或情态动词连用。中文意思是“只有通过做某事”。

例如，只有通过努力工作你才能享受美好生活和拥有更好的未来。

Only by working hard can you enjoy a better life and have a better future.

只要通过努力学习，你将在学习中取得更大进步。

Only by studying hard will you make greater progress in your studies.

2，only by then 常和过去完成时连用，中文意思是“只有到那个时候”

例如，只有到那时，他才意识到知识对工作的重要。

Only by then had he realized

the importance of knowledge to his work.