Complete with the correct form of the verb and choose for or since a. Ian ______ (not see) his cat for / since a while. b. Anna ______ (be) ill for / since last Monday. c. I ______ (not eat) ice cream for / since last summer. d. My dad ______ (have) this car for / since a few months now. e. My grandpa ______ (have) this book for / since years.

Решение:

• a. Ian hasn't seen his cat for a while. (Используем Present Perfect, так как действие началось в прошлом и продолжается, или имеет результат в настоящем. 'A while' указывает на длительность, поэтому 'for'. Отрицательная форма 'hasn't seen').
• b. Anna has been ill since last Monday. ('Since' используется с конкретной датой или временем начала действия. 'Has been' - Present Perfect от 'be').
• c. I haven't eaten ice cream since last summer. ('Since' с указанием времени начала. Отрицательная форма 'haven't eaten').
• d. My dad has had this car for a few months now. ('For' с указанием длительности. 'Has had' - Present Perfect от 'have', когда оно означает 'владеть').
• e. My grandpa has had this book for years. ('For' с указанием длительности. 'Has had' - Present Perfect от 'have', когда оно означает 'владеть' или 'читать').

Ответ: a. hasn't seen, for; b. has been, since; c. haven't eaten, since; d. has had, for; e. has had, for