选A
forget to do忘记要去做某事(没做)
forget doing 忘记已经做过某事了(已做)
I forgot _to buy_ a pen yesterday and bought another one today .
我昨天忘记去买钢笔了,今天去买了一支.
选A
forget to do忘记要去做某事(没做)
forget doing 忘记已经做过某事了(已做)
I forgot _to buy_ a pen yesterday and bought another one today .
我昨天忘记去买钢笔了,今天去买了一支.