speak loudly
そんな大声で話すな！
Don't talk so loudly!
大声で話すのはやめなさい。
Stop talking so loudly.
父はいつも大声で話す。
My father always speaks loudly.
彼は英語を大声で話す。
He speaks English loudly.
そんなに大声で話す必要はないですよ。
You don't need to speak so loudly.