如何使用 "forty" 造句

1. I knew him for more than forty years .
我认识他已经超过四十年了。
2. This was forty years ago .
这是四十年前的事了。
3. He started with them almost forty years ago .
他在那做了靠四十年了。
4. The longest snake on earth calls it quits at about forty feet .
地球上最长的蛇大约到四十英尺也就不长了。
5. Demand for food is expected to double over the next forty years .
据预测,在未来四十年中食物需求会增加一倍。