They never know where they are going,这句句子是什么结构

They never know where they are going 同义句 Where are they going tomorrow? Where are they all going? Are they teachers? 请问这句句子是什么意思? where do they go 和where are they going. Where are they going的中文意思 where are they going to see thebirds? where are they going to skate? London taxi drivers know where they are going.=London taxi d They never do their homework,they are going to_____ Where they are going 和 Where are they going 的区别 where are< >< they are< >< >< >