to dress up or to be dressed up?

1She intended to dress up as a ghost...是不是应该改成 to be dressed up...? 或是省略了herself，省略之前应该是to dress herself up...? We dressed him up as a gorilla.2类似的I'm just going to stretch out on the couch for ten minutes. stretch out or to be stretched out? Sean was stretched out on the carpet, listening to music.

英语有很多动词和动词短语既可以及物，也可以不及物。以“dress up”为例：作不及物动词短语使用时，有两个意思，一个意思是“put on clothes that make you look like someone else, for fun”(穿衣服装扮某人)，例如“The children had dressed up as princes and princesses.”(孩子们们穿上王子、公主的服装，打扮成王子、公主)；另一个意思是“put on clothes that are more formal than the clothes you usually wear”(穿上盛装，精心打扮)，例如“He had made an effort to dress up for the banquet.”(他精心打扮，准备出席宴会)。作及物动词短语(即“dress someone up”)时，也有类似的两个意思，一个意思是“put clothes on someone so that they look like someone else, for fun”(使……穿上衣服装扮某人)，例如“For her birthday party, her mother had dressed her up as a fairy.”(她妈妈把她打扮得像仙女过生日派对)；另一个意思是“make someone or something seem more impressive.”(使……某人或某物装扮得更神气)，例如“He hated being dressed up.”(他不喜欢穿得一本正经的)。同样，可以用不及物的“stretch out”，也可以用及物的“stretch someone (或something) out”。所以，原句不错。用作及物还是用作不及物，取决于说话人要表达的意思。

'get dressed' 只是指穿衣服, 把衣服穿好的意思. "dress up' 有'打扮'的意思, 不一定是要打扮得漂亮, 只是表示特殊穿着的意思. 例句如下: 1. (早上起床) we're late. please get dressed as fast as you can. 我们晚了, 快快穿衣服/快快把衣服穿好. 2. the party was canceled. i got dressed up for nothing. 聚会取消了, 我白打扮了. 3. i want to dress up as a duck this halloween. 今年哗弗糕煌蕹号革铜宫扩万圣节我要装扮成一只鸭子(的样子). 这样清楚了吗?