常见的有两种说法: 1) My elder brother spent one week teaching me how to play the guitar; 2) My elder brother took one week to teach me how to play the guitar.以上两名也可以用完成时来表示,但意思与用过去侧重点或证据略有不同。 还可以说, Teaching me to play the guitar has taken my elder brother one week. 或: It has taken my elder brother one week to teach me how to play the guitar. 在以上4个句子中,how也是可以省略的,但加上how再常见一些。希望对你有帮助!相信我,没错的!