。功能:。基本结构Thepresentperfecttensehave/has+done助动词(可以帮助构成肯定、疑问和否定句).(写一个一般疑问句)Hashecleanedhisroom?.(划线部分提问)HowlonghasshelivedinLondon?,________?(写出反义疑问句部分)hasn’.(写否定句)Theyhaven’?A:______yourbrother______hishomeworkyet?(finish)B:Yes,he‘:already用于肯定句,yet用于疑问句和否定句中A:_______youever_______tothepark?(be)B:No,:ever曾经用于疑问句中never从不带有否定意义I______just________thedesk,youcantakeittoyourclassroom.(mend)KeywordshavemendedyeteverneverjustalreadyJust刚刚与现在完成时连用一般置句中Justnow刚才与一般过去时连用
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