I mean he's been missing for several days. 我是說(shuō)他失蹤好幾天了。
I mean I've been losing weight these days. 我是說(shuō)這兩天瘦了不少。
I mean today, not tomorrow. 我是說(shuō)今天,不是明天。
I don't understand what you've saying. 我不明白你在說(shuō)什么。
I mean I want you to help me. 我是說(shuō),我希望你能幫我。