Question about Causative Sentences 1 Hi. I have several questions about causative sentences using the verb "have" like this; A) I had my hair cut. (Someone else cut my hair for me.) Then how do you mention the person who did that for you in this sentence pattern? Is it natural to add the phrase "by someone" to the end of the sentence? B) I had my hair cut by my mother. Or should I say like C)? C) I had my mother cut my hair. If the sentence C) is correct, is there any difference between B) and C) ? Thank you.