Jim has been over his homework and he is free now这句可以等于下面那句吗

Jim has been over his homework and he is free now这句可以等于下面那句吗 he is not free now.he is doing his homework(同义句） 英语翻译我把它翻译成这样：Jim has finished his homework ,he is free now 但 英语翻译tom has finished his homework,he is free now这种翻译可以吗?还说说要 He has done his homework同义句 Tom is busy now.He is doing his homework at home now的同义句 Jim has already finished his homework.（改为否定句） Jim finished his homework and then he went back home.(改同义句) where is jim he has gone to his country 或he has been in his Tom is busy now.He is doing his homework at home.改为两句重合 Jim is buy doing his homework.( 变为同义句) Jim is buy ______ his Jim is so care that he always looks over his homework to___t