this is my a pen一句中的一处错误在哪

this is my a pen 一句中的一处错误在哪 this is my a pen一句中的一处错误在哪 this is a my pen this is my pen的同义句 this is my pen 改为同义句 Is this my pen 同义句是什么 This is my a pen?对还是This is a my pen?对This is my pen？ this is a pen.改为复数句 what‘s this?——This is a pen·找出句中的错误,并改正 is,canada,in,my,pen,pal,this.(连词成句) pen in pal is Canada my This .连词成句 This is not my pen.(改为肯定句) This is my pen.Thanks.（改为同义句） This is my pen.------ ------.除了thank you还有哪些? 为什么说This is my a pen是错的? 为什么不能说 This is my a pen A:that's your pen.___ is my pen B:Do you __ this is interesting? 是This is my blue pen 还是This is my a blue pen有助于回答者给出准确的答案 请问 this is a pen 中的系动词（is）是不是在句中构成被动语态?