The phrase "act bravely" is correct and usable in written English.
You can use it when encouraging someone to face a challenging situation with courage or to describe someone's behavior in a difficult circumstance.
Example: "In the face of adversity, she chose to act bravely and stand up for what she believed in."
Alternatives: "be courageous" or "show bravery".
He knows that those who act bravely are all the more likely to feel anguished, since they know what's at stake.
Their words and actions become soundbites and images in a way that gives us an excuse not to act bravely in our own lives.
People who volunteer for military service or act bravely in battle consciously risk giving up most of their Biblically allotted threescore and ten, and for some this choice is both wise and generous beyond belief.
After quoting Mr. Twain on cowardice, he challenged Congress to act bravely, saying, "If we are going to keep America exceptional, we have to chart a new direction for our country".
Addressing the country on Saturday, Maliki said rebels from the Islamic State of Iraq and the Levant (Isis) had given "an incentive to the army and to Iraqis to act bravely".
He did act bravely on one occasion during the war, when he helped a comrade escape from a burning plane, but he invented a much more heroic career for himself; his last pseudonym was Group Captain Rupert Brooke.
Pavel acted bravely even in his childhood.
Americans seem to prefer the easy one: our SEALs acted bravely and competently.
A jubilant Tsipras hailed the results, saying that Greeks had acted bravely and proved democracy cannot be blackmailed.
"They were partners of police and many acted bravely in support of public safety and protection of fellow citizens".
"The shopkeeper acted bravely to defend his livelihood and in this case it paid off, but the reality is this could have ended in tragedy.
