英文原文: I have to help my mother to do housework after school. 英式音标: [aɪ] [hæv] [tə; before a vowel; tʊ; stressed; tuː] [help] [maɪ] [ˈmʌðə] [tə; before a vowel; tʊ; stressed; tuː] [duː] [ˈhaʊswɜːk] [ˈɑːftə] [skuːl] . 美式音标: [aɪ] [hæv] [tuˌtə] [hɛlp] [maɪ] [ˈmʌðɚ] [tuˌtə] [du] [ˈhaʊsˈwɝk] [ˈæftɚ] [skul] .