我知道用英語怎麼說

1、我知道用英語說法是：I Know。

2、例句：I know peoples handwriting changes as they get older. 意思是：我知道人們的筆跡隨著年齡的增長而變化。He went very quiet so I knew he was upset.意思是：他沉默不語了，所以我知道他很煩惱。