What's the matter with you？= What's the trouble with you？= What's wrong with you？你怎么了？

What should she do？她该怎么办呢？

Should I take my temperature？我应该量一下体温吗？

You should lie down and rest.你应该躺下休息一会儿。

He has problems breathing.他呼吸困难。

With his left arm, he bandaged himself so that he would not lose too much blood.他用左臂把自己包扎好，以便不会失血过多。

have a fever发烧

have a cough咳嗽

have a toothache牙疼

talk too much说得太多

drink enough water喝足够的水

have a cold受凉；感冒

have a stomachache胃疼

have a sore back背疼

What do you think it is？你认为它是什么？

这些句型涵盖了健康问题、建议、日常活动等多个方面，是八年级下册英语第一单元的重要组成部分。建议多加练习和记忆，以便在实际交流中能够熟练运用。