I cannot find my watch; I must have lost it.

我找不到手表了，我一定把它给丢了。

youdao

I cannot find my watch, I must have lost it.

我找不到手表，我一定是把它给弄丢了。

youdao

I cannot find my watch, I must have lost it.

我找不到手表，我一定是把它给弄丢了。

youdao