英语翻译这是他们第一次来中国大陆（mainland China).用It was .的句型.我用的It was the

英语翻译这是他们第一次来中国大陆（mainland China).用It was .的句型.我用的It was the it was very difficult to come to the mainland 的同义句 关于英语习惯用法!中国大陆是用China's mainland 还是Chinese mainland? 翻译成英文：这是你第一次来北京 用it is the first time句型 “在中国大陆”是in China mainland吗? it is/was 引导的句型 英语翻译给出的开头是：It was a Friday evening.Is was waiting at the bus i bought it when i was living in the china,为什么这里要用was living It was...before 句型 it was in 1949 that China was founded .这句话的 状语是什么 it was clear what she meant.改同义句 重点是it is 句型的转换. It was not until .that.是句型,有没有It was not until.when.的形式,举个例句