Question

Write the past forms of the following modal verbs. Can- must- may- is able to- have to-

Answer 1

 Can- could

must - не имеет прошедшей формы - нужно использовать эквиваленты - to have to или to be to - их можно употреблять в прошедшей форме

may- might

is able to-  was (were) able to

have to- had to