1. She also goes to visit other AIDS patients in hospitals across the country to support them and cheer them up.
cheer up作及物动词短语，意为\"使感到安慰;使高兴起来\"。如：
The nurse tried to cheer up the little boy when he started to cry. 当小男孩开始哭的时候，护士试图使他高兴起来。
cheer up作不及物动词短语，意为\"高兴起来;振作起来\"。如：
Cheer up!Things are not so bad as they seem. 振作起来!情况并不像看上去那么糟糕。
2. The disease is not the only thing that AIDS patients suffer from.
suffer作不及物动词用时，常与from连用，表示\"受......之苦(折磨);患某种疾病\"。如：
The child suffered from the cruel teasing of her classmates. 这孩子受到同学残忍的嘲弄。
She has suffered a lot from illnesses. 她已经受尽了病痛之苦。
suffer用作及物动词时是\"受苦;受痛;受损失\"之意，其后直接跟pain, loss, grief, defeat, insult, punishment, hardship, disappointment, discouragement等词作宾语。如：
He suffered the loss of a leg during the war. 在战争中，他失去了一条腿。
She suffered cruel oppression by landlords during the old society. 在旧社会她受到地主的残酷压迫。
only在本句中为形容词作定语，意为\"唯一的;独有的;仅有的\"，要位于冠词后。若only位于冠词前，则用作副词，意为\"只有;仅仅;只不过\"。本句中若only提前则意为\"不仅艾滋病人遭受折磨\"，即\"让别人也受其折磨\"，与文意不合。再比较：
He is an only child. 他是独生子。
He is only a child. 他只不过是个孩子。
3. Cells either divide too fast or at the wrong time, making it difficult for the body to function properly.
在本句中，现在分词短语作结果状语。又如：
The child fell, striking his head
against the door and cutting it. 那孩子跌倒了，头碰在门上碰破了。
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