My father (work) …………………… in Canada for the last year, so by the time he (return) …………………… the month after next, I (not see) …………………… ………… him for fourteen months.

Complete the following sentences with the correct form of the verbs in brackets.

My father (work) …………………… in Canada for the last year, so by the time he (return) ……………………  the month after next, I (not see) …………………… ………… him for fourteen months.