麻烦的是我们不知道他的地址。

The trouble is that we don't know his address.

youdao

不知道他的地址，我只好在家里等着。

Not knowing his address, I could do nothing but stay at home and wait.

youdao

可惜我不知道他的地址。

I wish I knew his address.

youdao

我不知道他的地址，我也不知道。

Neither do I know her address, nor does she.

youdao

如果他不知道你的地址怎么办？

What if he doesn't know your address?

youdao

我不知道他的地址，否则我就给他写信了。

I don't know his address, otherwise I would have written to him.

youdao

很遗憾，我不知道他的地址。

I'm sorry I don't know his address.

youdao

遗憾的是他不知道地址。

He was sorry he didn't know the address.

youdao

我不知道地址，他也不知道。

I don't know the address.

youdao

我担心他不知道我们的地址。

I fear that he doesn't know our address.

youdao

他肯定不知道我的地址。

He can't know my address.

youdao

我留了一张纸条告诉他我的地址，以免他不知道去哪里找我。

I left him a note with my address on for fear that he should not know where to see me.

youdao

因为不知道他的地址，我不能把这本书送给他。

Not knowing his address, I can't send this book to him.

youdao

因为不知道他的地址，我不能把这本书寄给他。

Not knowing his address, I could not send the book to him.

youdao

因为不知道他的地址，我不能把这本书寄给他。

Not knowing his address, I could not send the book to him.

youdao