请问下面这段英语有哪些语法?

题目

请问下面这段英语有哪些语法?
请问下面这段有哪些语法?
Some athletes also take drugs normally used to relieve stress in patients who suffer form high blood pressure or who have heart problems. Snooker players, archers and those who shoot in competition all need steady hands and cool nerves. It is believed that some athletes have taken these"calmers" for these reasons.
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答案

take drug固定用法,表示吃药
relieve stress减轻压力
suffer from一般后面是加疾病,表示因病受苦
in competiton在比赛中
It is believed..正如大家相信的...
for some reasons出於..原因