我的房间的（定语attributive）+墙壁（主语subject）+(是+黄色的)(谓语predicate)
if no "是"，the sentence is not full, but the meaning is ok,all Chinese can hear you.
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June 24, 2011
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First notebook entry: Introducing myself
friends,i believe that my coming will make your life full of sunshine! come on, we go to the line all together!
