现在完成时表示过去发生的动作对现在造成的影响和结果.如
she has finished writing this book.表示她已写完了这本书
We have cleaned our classroom.结果是教室已干净
一般现在时表示经常发生的动作.如
she often goes to school on foot.
I usually get up at six every morning.现在时和现在完成时都属于现在时范围.