tell后面必接宾语吗? 比如tell sth 不加sb.

tell意为“讲述”“告诉”,作及物动词时,指把一件事或一个故事讲出来,有连续诉说之意.如：tell the truth说实话,tell a story讲故事.tell也可接双宾语结构或复合宾语结构.如tell sb.sth.告诉某人某事；tell sb.about sth.告诉某人关于某事；tell sb.（not）to do sth.告诉某人（不要）去做某事.
1.What did your friend tell you five minutes ago?
五分钟前你朋友告诉了你什么?
2.The policeman told the two children not to ride a bike quickly.It`s too dangerous.
那个警察告诉那两个孩子骑自行车不要太快,那太危险了.
3.Can you tell me something about your pen friend?
你能不能请告诉我关于你的笔友的一些事情?
4.Mike’s grandfather often tells him an interesting story before he goes to bed.
迈克的爷爷常常在他睡觉前给他讲一个有趣的故事.