After a thorough search, we determined that he must have left it at the fountain.

经过彻底的搜查，我们断定他一定是把它落在喷泉边了。

youdao

He must have left a week ago.

想必他在一星期前就离开了。

youdao

He must have left for Beijing.

他肯定已经前往北京了。

youdao

He says particular care must be given to the thousands of children who were left behind, many of whom have become traumatized by the events.

VOA: standard.2009.09.25

It appears DeCoster's Iowa and Maine operations were in the red last year, but he must have the occasional good year or he (and his bankers) would presumably have long since left the business.

FORBES: Magazine Article

He must have done it enough to rack up some real profits and in the process left a lot of clients with no representation (not to mention lost money).

FORBES: Fugitive Lawyer Captured With $800,000 In Cash

Our first thought was that someone must have gotten into a fight with a boyfriend and that he had unceremoniously dumped whatever she had left at his house on the street.

FORBES: A (Modern) Miracle On 6th Street NW