modal verb应该,应当;(表示提出或征询建议)应该;(表示预期)应该会;(用于间接引语,作 shall 的过去时)
modal verba word that you use to tell or ask somebody what is the right thing to do
modal verba word that you use to give or ask somebody for advice
modal verba word that you use to say what you think will happen or what you think is true
modal verbthe word that we use for ‘shall’ in the past, when we say what somebody said