Eg. I always get up early.
Eg. The earth goes around the sun.
If it doesn't rain, we will have a picnic.
always, usually, often, sometimes, every day, on Sundays, at weekends, once a week, twice a month, etc.
Eg. I got up late yesterday.
Eg. When I was in the countryside, I often swam in the river.
常见时间状语：ago, yesterday, the day before yesterday, last week (year, night, month…), in 1986, just now, at the age of 10, at that time, once upon a time, etc.
基本结构：①am/is/are/going to + do;②will/shall + do.
am/is/are/going to + do
Eg. I'm going to go shopping with my mom tomorrow.
Eg. Look at the clouds, it's going to rain.
Eg. You'll have your own house in the future.
Eg. Will you go with me?
Eg. I will do it for you.
常见时间状语：tomorrow, next day (week, month, year…), soon, the day after tomorrow, in+时间段(格外注意)，etc.
Eg. I am writing a letter now.
Eg. I am reading a book these days.
常见时间状语：now, at this time, these days, etc.
Eg. He was playing computer games when his father came home.
Eg. He was doing his homework while his mother was cooking.
常见时间状语：at this time yesterday, at that time或以when引导的谓语动词是一般过去时的时间状语等。
基本结构：①was/were/going to + do;②would/should + do.
Eg. He said that he would marry her.
常见时间状语：the next day (morning, year…), the following month (week…), etc.
基本结构：have/has + 过去分词
Eg. I have finished my homework.
Eg. We have waited for her for 2 hours.
常见时间状语：recently, lately, so far, up to now, since+时间点，for+时间段, in the past few years, etc.
基本结构：had + 过去分词
Eg. Just before the English class, I suddenly realized that I had left my English textbook at home.
常见时间状语：before, after, by the end of last year(month…),etc.