1.一般现在时与现在进行时概述
2. 频度副词
课文里多次出现了说明动作发生频率的副词， 如：never, sometimes, always。
I never get up early on Sundays.
I sometimes stay in bed until lunchtime.
Do you always get up so late?
如何准确使用频度副词
名词或词组动作发生频繁程度如下：
100% all the time 90% almost, always 80% generally, usually
60-70% often， frequently 40-50% as often as not 20-30% sometimes， at times
10% occasionally， from time to time 5% rarely, hardly, ever, seldom
0% never
对频度副词进行提问时，要用how often。
How often do you do the laundry a week?
How often does Jimmy go to the gym?
辨析： sometimes，some times，some time，sometime
I sometimes stay in bed until lunch time. 有时
I have overslept some times.有几次
We can grab something to drink sometime next week. 某时
I had known Ken for quite some time before dating him.一段时间
