令人纠结的非谓语!The foreigner tried his best,but he still couldn't

I tried my best,but I still couldn’t reach to the top shelf He tried his best,but he still failed the exam.这个句子改成同义句. The young teacher tried his best,but he still could not make He tried ____(catch)the cat,but he couldn't He ( ) his bag ,but he still couldn't find his purse 是词汇运用的题 he raised his voice,but still couldn't make himself ___.此处填的 When he fell off the bike,he tried ____ but couldn't . He tried to move the sofa upstairs _______ ,but couldn't man 【非谓语选择题】（ ）the key,the boy couldn't enter his house. I tried my best but i （ ）couldn't solve the problem在括号内填介词 副 he tried his best to save the drown girl,but unfortunately s the doctor has tried his best,but he doesn't____ any hope of