使役动词have done和get done区别在哪里？

我知道一个表达要求一个表达劝说，究竟什么时候用get 什么时候用have？
EX:Would it be possible to get these picture framed?
Could I have these sandals repaired here?
为什么一句话用get 一句话用have 互换的话字面意思也说的过去啊

have sth. done 和get sth. done的意思其实是一样的，都是表达“（让别人）做某事”的意思

比如说，I have had my room cleaned. 我已经（让别人）打扫好了房间。
I need to have my hair cut tomorrow. 我明天要去剪头发。（其实是让别人剪）
get sth done 一般是指自己完成的，比如I get my homework finished. have sth. done 一般是由别人完成的，比如I have my hair cut.
have+sth(宾语)+过去分词(宾语补足语)
意为"让/叫/使/请别人做某事"
宾语sth后面用过去分词作宾语补足语，说明sth与过去分词表示动作之间的被动关系。
have/get something done=完成了什么事情，做完了什么事情
i have my hair dyed in red color. 我把头发染成了红色。
搭配中的done在句中必须是过去分词的形式，表示什么被做了，或者已经做了什么

have+宾语+过去分词= get+宾语+过去分词。 have和get都可以作使役动词，但用法不尽相同： have+宾语+宾补（动词原形、分词、形容词、副词、介词短语）；get+宾语+宾补（带to的不定式、分词、形容词、副词、介词短语）。例如： Please have him come here. 请叫他到这里来。 I won't have / get you running around in the house. 我不允许你在家里到处乱跑。 I can't get the old radio to work. 我无法让那旧收音机工作起来。 Can you really get / have that old car going again? 你真能让那旧车运转起来吗? He got / had his wrist broken. 他折断了手腕。 She soon got / had the children ready for school. 她迅速使孩子们做好了上学准备。 He has got / had his coat dirty.他把上衣弄脏了。 Get / Have these chairs outdoors, please.请把这些椅子搬到外面去。 I'll get / have the child home.我来接这个孩子回家。 I can't get / have all the children across the river. 我无法让所有的孩子过河。

have+宾语+过去分词= get+宾语+过去分词。 have和get都可以作使役动词，但用法不尽相同： have+宾语+宾补（动词原形、分词、形容词、副词、介词短语）；get+宾语+宾补（带to的不定式、分词、形容词、副词、介词短语）。例如： Please have him come here. 请叫他到这里来。 I won't have / get you running around in the house. 我不允许你在家里到处乱跑。 I can't get the old radio to work. 我无法让那旧收音机工作起来。 Can you really get / have that old car going again? 你真能让那旧车运转起来吗