three months' holiday 可以表达成three-month's holiday吗?为什么在这还要" 's"?three-month-holiday,如此表达行不行,就好像ten-year-old 一样?three-month's holiday 有了“-”在中间为什么还要" 's

first three months Only three more months to three months later中文是什么意思 是three-month还是 three-months对 l have met him three months agol met him three months ago改成I have met him three months before for three months用什么提问 three months是单数还是复数 three days months , weeks叫什么词 I have studied English for three months. about three and a half months ago in three months提问用什么 he was in school f____only three months Know you for three months是什么意思 three months is a long for me ,three months 是复数,为什么有要看成整体 three months and half 和three and a half months 有什么区别? Kate has been making a film for three months.针对 for three months划线提问. in three months 与 for three months区别they will have the final exam ____ theree months it took them three months ____ ( build) the bridge .