例句與用法:
1. He came here two years ago.
他兩年前來到這裏。
2. He joined the army a year ago.
壹年以前，他參軍了。
3. Long ago enormous animals lived on the earth.
很久以前，地球上生活著巨大的動物。
4. There were lots of buffaloes in the North America 100 years ago.
100年前，北美有大量的野牛。
5. All that happened many moons ago.
那壹切都發生在很久以前。
6. The population has increased from 1.2 million 10 years ago to 1.8 million now.
人口從10年前的120萬已增加到現在的180萬.
7. They were supposed to be here an hour ago.
他們應該在壹小時以前到達這裏。
8. It happened quite some time ago.
那是很久以前的事.
英英解釋:
形容詞ago:
1. gone by; or in the past
同義詞：agone
副詞ago:
1. in the past