c.only to
only和不定式连用常构成结果状语,表示与预料相反的结果,意思是“竟然……、结果……”.如：
He studied hard only to fail in the exam.
他这么用功,竟然在考场上失利.
He rushed all the way to the station only to miss the train.
他一路冲往车站,结果还是错过了火车.
My wife went home in a hurry only to find the door locked.
我妻子急忙回到家,结果却发现门锁着.
He tried a second time only to fail again.
他再试一次,竟然还是失败了.