I always warn myself.

我总是告诫自己。

youdao

I always warn my father not to smoke.

我总提醒我爸爸不要抽烟。

youdao

However, I always warn myself that PE should never be forgotten. I know the essence of PE.

我则反复告戒自己：永远不要忘记PE，因为我知道它的本质。

youdao

They're not allowed to preach, and principals always warn students that they are being taught by Christians.

CNN: ASIANOW - TIME Asia | China: Inside China's Search for Its Soul

Mr. DOUGLAS: What I always warn people is these are professional liars.

NPR: Pretexting Is Alive and Well in Corporate America

Estate planners have been using grantor trusts for the past two decades, but they always had to warn clients that the IRS might consider the income tax payments by the grantor to be further taxable gifts to the beneficiaries of the trust.

FORBES: The IRS Grants A Wish