化简复合结构的句子(速度解决呀!)

化简复合结构的句子(速度解决呀!)
用V-ing,V-ed,to do,with,将下列复合结构化简.(划线部分.)
1)
If you want to improve your English,you need to pratise it a lot.
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2)
Because she hadn't received a letter,Maria became very worried.
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3)
(获得奖学金)（win） gave Martin the chance to go to a college.
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当然不止这三句.- -
有没有好心人具体的跟我讲一讲该怎么化简.
哪里需要省略之类的……
我不可能都发上来吧.
教教我咯.T T
有的下划线可能划过了..- -