eg.We often write to each other. 我们时常相互通信。
常与always，usually，often，sometimes，every day，once a week，yearly每年，monthly每月， 等时间状语或频率副词连用。
eg.He works hard.他努力工作
eg.The sun rises in the east. Light goes faster than sound
eg.You will succeed if you try .
I will tell him about it as soon as I see him next Monday.
常与连词：when , as soon as , before , after , until , if 如果，等引导的时间状语或条件状语从句
e.g. He arrived in Hangzhou an hour ago. Where were you just now?
e.g. Their children often went hungry in the old days. During his middle school years, he played football nearly every day.
(3).表示主语过去的特征或性格等. e.g. At that time she spoke very good English.
(4).一般过去时往往和明确的过去时间状语连用.如:yesterday, last night, two days (months, weeks) ago, in 1996, at that time 等,也常和when, if等引导的状语从句连用. e.g. Did you play volleyball yesterday afternoon? My father, when he was a child, worked 15 hours for the landlord a day.
(5).一般过去时可与today, this week, this month等时间状语连用. e.g. I saw him today. He came late three times this week.
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