Refer to the following sentences, changing the forms of the modal verbs must, can, may to the past and future tense

Refer to the following sentences, changing the forms of the modal verbs must, can, may to the past and future tense, as well as using the negative and interrogative forms. Please also provide the translations for each sentence.

a) 1. Did he have to read the book? / He didn"t have to read the book. / He had to read the book? / He hadn"t read the book.
2. Did a secretary have to come to work in time? / A secretary didn"t have to come to work in time. / Did a secretary have to come to work in time? / A secretary hadn"t come to work in time.
3. Did we have to pass the examination in English? / We didn"t have to pass the examination in English. / Did we have to pass the examination in English? / We hadn"t passed the examination in English.
4. Did I have to finish the translation in time? / I didn"t have to finish the translation in time. / Did I have to finish the translation in time? / I hadn"t finished the translation in time.
5. Did he have to work hard? / He didn"t have to work hard. / Did he have to work hard? / He hadn"t worked hard.
6. Did Bob have to learn these new words by heart? / Bob didn"t have to learn these new words by heart. / Did Bob have to learn these new words by heart? / Bob hadn"t learned these new words by heart.

b) 1. Could she translate this sentence from English into Russian? / She couldn"t translate this sentence from English into Russian. / Could she translate this sentence from English into Russian? / She hadn"t translated this sentence from English into Russian.
2. Could Jane continue her studies at the correspondence department? / Jane couldn"t continue her studies at the correspondence department. / Could Jane continue her studies at the correspondence department? / Jane hadn"t continued her studies at the correspondence department.
3. Could I hire a car from our local garage? / I couldn"t hire a car from our local garage. / Could I hire a car from our local garage? / I hadn"t hired a car from our local garage.
4. Did Dr Parker have to attend the conference? / Dr Parker didn"t have to attend the conference. / Did Dr Parker have to attend the conference? / Dr Parker hadn"t attended the conference.

Please provide the translations for these sentences as well.