I wish I could go with you.
我真希望能和你在一起。
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今天的几个句子是有关暂时无法见面时：1.Please give my regards to your family.请代我向你的家人问好。2.Let's get together again sometime.我们什么时候再聚吧。3.Let's keep in touch.让我们保持联系。4.Don't forget to write.别忘了写信。