求下列语段的语法When your daytime sleep period is too short,taking a

这是一篇关于怎么提高睡眠质量的短文,因此里面有不少直接动词带出的祈使句.
When your daytime sleep period is too short（when引导时间状语从句）,taking a short nap of less than 30 minutes （taking动名词词组做主语） just before work or on a break（对take nap的时间修饰） has been shown to improve alertness and enhance performance.
Develop and follow a sleep routine.（养成并遵守固定的睡眠安排/习惯） It's best if you go to sleep and wake up at the same time every day (if引导条件状语从句）.Try not to vary this too much on weekends.Your body likes routine.
Take extra care to make healthy choices.You may be tempted to reach for unhealthy foods or nicotine to stay awake or alcohol to try to sleep.But ultimately these choices are more harmful than helpful.
If（引导条件状语从句） you have tried all these things and are still having problems getting enough quality sleep （have problem doing sth,意思是做某事遇到困难）during the day,talk to your doctor or a sleep specialist.Sometimes medications（药物治疗）may be helpful and safe.In other cases,there may be an underlying sleep disorder that （引导定语从句,修饰disorder) needs to be addressed.
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