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once

once a week是频率副词,表示的是一种不断重复的行为频度,往往放在句子中间，实义动词之前，非实义动词之后，在否定句中，有的频度副词位于否定词之前或之后均可，而有的频度副词则必须位于否定词之后，还有的频度副词却必须要位于否定词之前。0o2高三网

once a week是频率副词吗

频率副词等级0o2高三网

all the time 100%；0o2高三网

almost，always 90%；0o2高三网

generally，usually 80%；0o2高三网

often，frequently 60-70%；0o2高三网

as often as not 40-50%；0o2高三网

sometimes，at times 20-30%；0o2高三网

occasionally，from time to time 10%；0o2高三网

hardly，seldom，rarely 5%；0o2高三网

never 0%。0o2高三网

3、频率副词用在be动词后0o2高三网

He was always late.他以前经常迟到。0o2高三网

4、频率副词用在实意动词前0o2高三网

My father usually walks home.我的父亲经常步行回家。0o2高三网

once a week造句

1、How many skateboard classes once a week?0o2高三网

2、Occurring, appearing, or done once a week or every week.0o2高三网

3、Go once a week if you can.0o2高三网

4、Lung cells were replaced once a week.0o2高三网

5、She does the aerobics once a week.0o2高三网

6、What you should do: Run Yasso 800s once a week.0o2高三网

7、We used go to the movies about once a week.0o2高三网

8、Hence clean the ears once a week with cotton buds.0o2高三网

9、They also check for diseases or pests once a week.0o2高三网

10、Proofread the English Ad once a week by Email.0o2高三网

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标签： once 高中英语