为什么好多试题“I often go to shopping on weekend”中的weekend都是没有加s?是不是出错了?有often哦?

为什么好多试题“I often go shopping on weekend”中的weekend都是没有加s?是不是出错了?有often哦? 为什么好多试题“I often go to shopping on weekend”中的weekend都是没有加s?是不是出错了?有often哦? i don't often go to the park.还是i often don't go to the park.哪个对. i/like/go/to/horse/but/cn't/i /riding/go/very/often/连词成句 i go often swimming,i go swimming I often r___at home.I don't want to go out. 一般现在时否定句频度副词放在什么位置I don't often go there.还是i often don't go there. He _______ to bed at nine.doesn't often go/often doesn't go/not often go/go often we don't often go to the library 为什么用 don't we don't often go to the library 为什么用don't? I don't often go to school in my father's car.改为 完全否定 I work very hard and I often go to work_______为什么选 on weekends I often go to shopping on weekends在“I often go to shopping on weekends.”中week要不要加s的?为什么?请详细说明. i can't go He often ______ me when I go shopping.He spoke very ______ that I couldn't follow him. I often go skating.=I go skating( ) ( ) ( ) 为什么不能填too Mary won't go shopping this afternoon.I won't go,------------ i often go shopping on sundays .为什么sanday要加s啊