现在进行时

I am eating fried chicken in People's Square.

现在进行时的构成

be + 动词的现在分词

现在分词的变形

• 动词直接加ing
eat -> eating,study -> studying
eg：She is eating food.
• 去e,加ing
dance -> dancing,like -> liking,write -> writing ...
  eg：She is writing her homework.
• 双写最后一个字母,再加ing
run -> running,cut -> cutting,swim -> swimming
• 不规则变化
  lie -> lying,die -> dying

现在进行时用法

• 说话时正在进行的动作
  now,at the moment等这些表示时间的状语作标志
  look,listen,can't you see等这样的暗示语
  eg：I am preparing for my class now.
eg：Listen,She is singing an Englist song.
• 表示现阶段正在进行的动作
  常与these days,this week,this month,this term等这些表示一段时间的词语连用
  eg：These days we are helping the farmers work on the farm.
eg：Mr Jason is visiting our village this month.
• 与表现变化的动词一起用,强调逐渐变化
  eg：The sky is getting dark.
eg：My dream is coming true.
• 表示即将发生的事情
  eg：When are you leaving for America?
• 与always,forever,continually,constantly等副词连用时表示重复的动作,有着极大的感情色彩,表示不满意或满意
  eg：The students are making progress constantly.
eg：My little brothers are always fighting.

【表示可变化的动词】
arrive,come,do,get,go,have,leave,meet,play,return ...