Tony and Mary is going to have a picnic 这句话错在哪里?

Tony and Mary is going to have a picnic 这句话错在哪里? Tony is going to hava a picnic ____(填什么) We will going to have a picnic tomorrow.错在哪里? Mr White and Miss Black is going to have a picnic.[改错：写出正确句子 Mr white and Miss Black is going to have a picnic.(改错) Mr.white and Miss blask is going to have a picnic 改一处错误 How We are going to have a picnic on next Sunday.这句话有何错误. Tony is going on the picnic with______friends.A She is going to take a trip yesterday.这句话错在哪里了 When is he going to have a picnic?那个错了 this is mary,we are going to the zoo and have a look at the They are going to have a picnic()