1.I have worked as a volunteer for three years=>I started..................................

Cách làm:
1. Đổi "I have worked as a volunteer for three years" thành "I started working as a volunteer three years ago"
2. Đổi "I have worked as a volunteer for three years" thành "My volunteer work has spanned three years"

Câu trả lời:
1. I started working as a volunteer three years ago.
2. My volunteer work has spanned three years.

I kicked off my volunteer experience three years ago.

Three years ago, I embarked on my volunteer journey.

My volunteer work began three years ago.

It has been three years since I began working as a volunteer.