tell the truth 说真话 tell a lie 说谎
tell the time “报时“ tell a story 讲故事
tell sb. sth./ tell sth. to sb. tell me a story
tell sb. to do sth.My mother tells me to buy some fruit.
tell : 辨别,说出区别 tell A from B
tell the differences between A and B
speak强调开口说话、发言的动作,后跟某种语言做宾语时是及物动词
talk强调双方说话,为 vi ,后需接介词再加宾语 talk to / with/about
tell接双宾语 tell sb. about sth/ tell sb. to do sth. /tell sb. sth