非常

extraordinary session/situation/event

She speaks English with great fluency. / She speaks very fluent English.

She has been debilitated by her serious illness.

I'm very grateful to you.

She has a silver tongue.

perfectly correct

of great rarity

dreadfully crowded

deadly dull

remarkably accurate

simply marvellous

extremely nervous

extraordinarily moving

exceedingly rich

enormously successful

highly necessary

awfully/terribly sorry

attach great importance to; place much emphasis on