The phrase "act assertively" is correct and usable in written English.
You can use it when advising someone to express their thoughts, feelings, or needs confidently and directly.
Example: "In negotiations, it's important to act assertively to ensure your interests are represented."
Alternatives: "speak confidently" or "behave decisively."
Moreover, they argue, the issue is not how the intelligence is received but what a president does with it, asserting that Mr. Bush and Mr. Cheney did not act assertively enough on warning signs from intelligence agencies before the attacks of Sept. 11, 2001.
Act assertively, and we'll put you down.
He has also said the federal government should act assertively to fight "price gouging".
It is high time that we act assertively to resolve the 61-year Palestinian tragedy and end the ongoing crisis.
"We need to act assertively and increase the costs for those committing street crimes," he said, according to the semiofficial Fars news agency.
I knew I might not fit into the chair provided, and to perch on the end of it for hours while trying to act assertively is not easy.
And like Benedict, whose handling of delicate cases before he became pope has come under scrutiny, Cardinal Levada often did not act as assertively as he could have on abuse cases.
But they did not act as assertively as President Obama had hoped, and he left little doubt that he considered one country, China, the primary source of the problem.
But the members gave Mr. Mugabe and leaders from across southern Africa an earful on Monday about Zimbabwe's grave humanitarian crisis and their responsibility to act more assertively to resolve it.
Yet this strong suggestion that the US government has used "force-feeding" as an excuse to punish hunger-strikers has not led the Senate Intelligence Committee or Senate Armed Services Committee to act more assertively against punitive force-feeding currently going on at Guantánamo Bay.
Salvini's brazen politicization of the issue, critics say, has added a veneer of legitimacy to deep-seated prejudices, and emboldened racists to act more assertively.
