He hasn't worked out the maths problem at

He hasn't worked out the maths problem at He's worked there since the shop opened in 1998,hasn't he 为什么是“hasn't he”而不是“isn't he? He;s worked in this factory for many years ------ he?A.has B.hasn't C.is D.isn't He hasn't contacted me since I worked in that company.求翻译一下这句话顺便解释一下用法. however hard he tries ,the recorder A didn't work B won' t work C isn't working D hasn't worked 应该选择哪个? however hard he tries,the recoder____.A.didn't work B.won't work C.isn't working D.hasn't worked so that 连接句子he hasn't enough money.he can't buy sports shoes2/they could go back home earlier.wthey worked hard He's worked there since 1990,____________?A.doesn't he B.didn't he C.isn't he D.hasn't he选哪个?本题考查反义疑问句 he worked out math proble____(success) he hasn't come yet是什么时态? he hasn't had breakfast yet. he hasn't decided it yet.请译出 But he hasn't got ______money. 16.He has worked in this school for many years,_______ he?A.has B.hasn’t C.is D.isn’t为什么选A,而不是B,前面肯定,后面不应该否定吗? He said that words couldn't d( ) his joy whHe said that words couldn't d( ) his joy when he worked out the maths problem. this machine___.it hasn't worked for yearsdidn't work wasn't working doesn't work isn't workingw为什么 My brother’s never late for class,_______?A.has he B.hasn’t he C.is he D.isn’t heMr Reece worked on a farm.He and his wife grew a lot of things and they had some cows（奶牛）.Every day they worked hard 1 morning till night.One day,Mr Reece he worked hard,so he worked out of the difficlt problems.同义句