He's still unable to make himself____in English.为什么要填understood而不是understand?

He's still unable to make himself____in English.为什么要填understood而不是understand? Why love each other still unable to love Unable to 英翻译中:and see me to discuss if still unable to turn the situation around. he is still unable to make himself understood有人说是被动哪make后省略的（TO）呢?这里为什么要用过去分词?还有被动不是be down吗?省略了to be? It's ten o'clock ,he is still to study语法对不对 Unable to write to unable to connect to 在He stood leaning against the wall,unable to speak.中unable是adj?它前面省略了系动词? he has ( )little education( ) he is unable to get a job.填so/such/that. unable to 意思 unable to write unable to reach internet unable to connect是什么意思 unable to process request. UNABLE TO PYOCESS REQUEST unable to get rid, unable to connect是什么意思