The phrase "became perplexed" is correct and commonly used in written English.
It can be used in various contexts and is often used to describe a sudden change in someone's emotions or thoughts. Example: As she watched the complicated math problem being solved, she became perplexed and couldn't understand how the solution was reached.
The group was presented with the usual dog-and-pony show, but instead of being impressed, as most visitors tend to be, with the size and expertise of the Saudi oil industry, Simmons became perplexed.
I first became perplexed while looking at a thickly knit mauve cardigan.
"And more and more I became perplexed by the complete stand-down of the enforcement arm of our government".
But those attacks never materialized, and many American officials became perplexed in recent years over whether Iran had decided not to use terrorism as a weapon against the United States, at least outside the war zone in Iraq.
Baldessari constructs a vivid, skewed world in which the viewer can either participate or smile and walk away — a world whose complicity with the one we know becomes increasingly perplexed as the exhibition unfolds.
And as Mr. Hickox noted during a tour through several unoccupied Peninsula suites, a guest can become utterly perplexed by the challenges of figuring out how to cope with a modern hotel room.
"Suddenly it all became about the money," concludes a perplexed Banksy, "But it never was about the money".
"My parents were somewhat perplexed," Capwell admits, but, undeterred, he moved to England and became a leading scholar in the field.
In my experience, the more educated a person, the more possibilities they consider and the more perplexed they become.
Writing about film has been a voyage of discovery with two interlocking purposes: I write to be, to borrow Maimonides' wonderful title, a guide for the perplexed, to help viewers find films they will love, but writing reviews soon became more than that.
It shows a man whose young, dashing moustache becomes progressively more mournful and perplexed, but whose appetite for life never diminished.
