1. be strict with ,with 后 加人，对某人很严厉,严格

例：My father is strict with me.

我父亲对我严格要求.

2. be strict about 对某事很严格

例：We must be strict about this problem.

我们必须严肃对待这个问题。

3. be strict in (doing) 对做的某事很严格(强调是在做的)

例：We should be strict in (doing) our work.

对工作我们应该严格要求。