不得不英文音标

He was poor, had to drop out of school to go to work

[hæv tu:]

[hæv] tu

I have to doing english homework

英文原文：I have to learn the piano on Sundays.英式音标：[aɪ] [hæv] [tə; before a vowel; tʊ; stressed; tuː] [lɜːn] [ðə] [pɪˈænəʊ] [ɒn] sundays . 美式音标：[aɪ] [hæv] [tuˌtə] [lɝn] [ðə] [pɪˈæno] [ɑn] sundays .

I'm obligated to go to learn the piano on Sunday.

My pen is lost. I have to buy one.

英文原文：I have to do my English homework.英式音标：[aɪ] [hæv] [tə; before a vowel; tʊ; stressed; tuː] [duː] [maɪ] [ˈɪŋɡlɪʃ] [ˈhəʊmwɜːk] . 美式音标：[aɪ] [hæv] [tuˌtə] [du] [maɪ] [ˈɪŋɡlɪʃ] [ˈhomˈwɝk] .

He is poor, had to drop out of school to find a job