He didn't know -------to do?应该填how还是what?why?

He didn't know how he could get here He said he didn't know it yet 怎么翻译 英语句子成分划分He didn't come.That is why he didn't know He didn't know what to do next.He didn't know what he ____ ____ next. He didn't know what he should do.(改为简单句)He didn't know ___ ___ ___. He didn't know when he would start.(改为同义句） He didn't know （ ） （ ）（ ） didn't he know the sun (rise) in the east? he didn't know what to do .反义文句 He didn't know a world of English.翻译, He didn't know which hat was his.还是应该用：He didn't know which hat his was. I didn’t know we never told him he couldn't ,so he didn't know.he just left it His friend didn't know what he should do改同义句His friend didn't know（ ）（ ）（ ） the man didn't know which gift he should choose.=the man didn't know __ __ __ __. My brother didn't know what he should say.(改为同义句)My brother didn't know what _____ _____. He still didn't know what he would do nextHe still didn't know___________________________改写句子 不改变意思 英语翻译We didn‘t tell him he probably would never make the team,so he didn’t know. He didn't know if he had passed the exam.这句话从语法上来讲对吗?didn't know 能与 if 句末需要加or He didn't know if he had passed the exam or not.