Modals are always the first word in a verb group.

情态动词总是出现在动词短语中的第一位。

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This is followed by a verb group, which tells you what the subject is doing, or describes the subject's situation.

动词词组通常表示主语的行为或描述主语的情形。

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The verb group may be followed by another noun group, which is called the object. The object is the person or thing affected by the action or situation.

谓语动词后面可跟名词短语构成宾语，宾语是主语动作的承受者或状态的结果。

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Like many technology entrepreneurs, Jay Samit says he knew ooVoo LLC, a video-chat startup, was poised for growth last year when he heard a group of teenagers use it as a verb.

WSJ: How I Built It: Video-Chat Tool Expands From Its Teen Base