1、Period Six语法感知have been enjoyinghave been enjoyinghave been cominghave been worried about本课栏目开关语法感知知识储备Period Sixhave been designinghave been interestedhave designedhave been taking part inhavetaken part inhave been building语法感知本课栏目开关语法感知知识储备Period Sixhas been playing the piano for 32 dayshave been
2、questioning a man since earlythis morning语法感知本课栏目开关语法感知知识储备Period Sixhas been barking for half an hourhave been preparing(for their holidayhave/has been discussing(theproblem of)rising crime since last yearin India)for months语法感知本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备P
3、eriod Six知识储备本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备Period Six知识储备本课栏目开关语法感知知识储备Period Sixhave been doinghas comehavent played知识储备本课栏目开关语法感知知识储备Period Sixhas cleanedhas been tellinghas been workinghave beenproducedhave been studying知识储备本课栏目开关语法感知知识储备Period Sixhas receivedhave attended知识储备本课栏目开关语法感知知识储备
