it is a long time和it is long time 的区别

it is a long time和it is long time 的区别 it's a long time 和 it's long time 的区别 it has been a long time. what is up 英语翻译it is difficult,and it is painful,and it takes a long long long long time,这句怎么翻译? it is a time it took a long time 歌词 it's a long time什么意思 It's raining for a long time? You find it a long time Has it beensnowing for a long time? It was quite a long time 16 days is a long time ,but it is very important to us chinese It Will Take A Long Long Time 歌词 Is the dog still a--- it doesn’t move for a long time.----a .这个单词? Is the dog still a--- it doesn’t move for a long time.----a .这个单词? It's a long time since还是It has been a long time since 状语从句before比如：类似：it was a long time before we met again和完成时的：it is a long time since my brother joined the army这种类型的要怎么区分? It is a long time that they take bath.最后加一个for