- I won’t allow them to fell the trees. (我不會允許他們砍樹) (正)
- I won’t allow them to fall the trees. (誤)
解說:Fell 是個規則動詞 (regular verb),意為「砍伐,砍倒」,其時態變化為 fell, felled, felled, felling。Fall 是個不規則動詞 (irregular verb),意為「落下,掉落;降落;跌落;跌倒;下降;減退」等,其時態變化為 fall, fell, fallen, falling。