I'd better do something: Tôi nên làm một việc gì đó thì hơn. Nếu tôi không làm tôi gặp rắc rối hoặc trục trặc: - I have to meet Ann in ten minutes. I'd better go now or I'll be late. - ‘Shall I take an umbrella?’ ‘Yes, you'd better. It might rain.’ - We'd better stop for petrol soon. The tank is almost empty.