1.A dietitian is cooking the meal.She works for the museum 改

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1.A dietitian is cooking the meal.She works for the museum 改写成定语从句：the dietitian who is cooking the meal works for the museum.为什么“works”前没有“is”?
2the movie advertised in the paper is shown on weekdays .改写成定语从句：the movie which is advertised in the paper is shown on weekdays .为什么“advertised”前又有“is”了?

第一句的主语是the dietitian ,它的谓语就是works,因为the dietitian 是第三人称单数,所以用works,而who is cooking the meal 是修饰the dietitian 既是作为定语部分,对于第一句来说,句子的主干是the dietitian （who is cooking the meal） works for the museum,不要看括号那部分,括号那部分只是修饰the dietitian.你试想一下,如果一个句子是
the dietitian _____for the museum,横线上要你填work的一个正确形式,相信根据A dietitian is cooking the meal.She works for the museum 这个原句的第2句,你会很自然地在横线上填上works而不是is works吧?更何况没有这样的一种形式!
至于第二个,在定语从句 which is advertised in the paper 中,which是这个句子的主语,which指代的正是the movie,那试问,电影是被人做广告,做宣传,还是自己做广告,做宣传?因为电影是一个物体,它自己不能advertise,只能被人advertise,所以这个地方要用被动形式,而被动形式的结构式be动词+动词的过去分词,用到上文正是is+advertised（advertise的过去分词）,所以才要加is,这个is的用意是形成被动结构!
在定语从句中选择动词的正确形式一般要取决于对应的主语或宾语在所在的句子中是不是主动,如果是被动需要用被动形式,如果是第三人称单数则要选用对应的第三人称单数.

1.A dietitian is cooking the meal.She works for the museum 改 Lily 什么 herself while she was cooking the meal.(burn) 关系代词和关系副词1.Is this the museum ___your mother works?A.that B. There is a "m" in the word "meal".改病句 Daming sits on the side of the river,cooking the meal for hi My mother is cooking a good meal. mother,kitchen,Li Ping's,the,cooking,the,meal,in,the,is 连词造句 1.Helen works in a hospital.She helps the sick people.She is 英语考试busy用法father is busy cooking the meal while i'm busy the Sandy and Tom are cooking the meal.对 cooking the meal.提问 Wang Damin sits on the side of the river cooking a meal,with Last year the works b_____ the museum.