1. The doctor said you should lift your feet.
A说B应该做某事,在英语上就是A said B should do sth. 这里的should是情态动词,通常用来表示现在或将来的责任或义务,译作“应该”、“应当”,这时它可以和 ought to, be supposed to 互换使用。
You should (= are supposed to ) complete your test in time.
你们应该按时做完你们的实验。
You should (= ought to ) tell your mother about it at once.
你应该立即把此事告诉你妈妈。
In sum, theory should be combined with practice.
总之,理论应该与实验相结合。