汉语可说阻止某人做某事，但英语习惯上不能说 prevent sb to do sth，遇此情况可改说 prevent sb (from) doing sth或prevent sbs doing sth。如：
■我们一定要防止疾病蔓延。
误：We must prevent the disease to spread.
正：We must prevent the disease (from) spreading.
■大雨使他不能来。
误：The rain prevented him to come.
正：The rain prevented his (from) coming.
正：The rain prevented his coming.