be + days/weeks + prepositional phrase or adverb phrase. I've run into the following sentences while reading subtitles of a movie. ● We are two days behind. ● We were weeks in the doldrums. How do I understand this? I sometimes see sentences with this structure. Is it standard English? I tried searching Internet for the page where this rule of grammar is explained, but I couldn't find. Could you possibly explain about this or give me a link to the webpage containing the instruction on this?