'he seems upset' is a grammatically correct sentence that can be used in written English. It is often used to express an observation made about another person's current emotional state. For example, "Karen looked away quickly when I asked her about the project; he seems upset about something."
Now, because Simmonds is difficult to work with at times and because he seems upset about the situation—I suggest that Murray first talk to Carpenter.
If he seems upset by the idea, comfort him and gently explain why it's necessary.
Rappo was there, and she thought that he seemed upset.
He seemed upset that a Guardian person should even be present.
When I met Wadhwa at a coffee bar near his office, he seemed upset by the agency's bad press and, perhaps for that reason, eager to tell me how they caught Rajaratnam.
He seemed upset at his lawyers, and that the hearing was taking place despite his sending a letter to the court trying to withdraw the motion to suppress the statement.
He seemed upset over funding shortfalls.
"In fact," Darden continued, "he seemed upset?
And people, she seemed upset.
He seemed upset, and showered again the following morning.
"He seemed upset I was able to hit the ball".
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK