(1) 表示发生在谓语动作之前的动作：He seems to have caught a cold.

网友回答

谓语是seem
seem to do sth似乎.
后面的have caught a cold表示时间状态的,也就是只是表示发生在现在之前
======以下答案可供参考======
供参考答案1:
caught
供参考答案2:
seem是谓语。
have caught是非谓语动词。
供参考答案3:
seem供参考答案4:
两种解释1. seem 谓语，后面是动词不定式非谓语
2. seem to have caught 整个部分为谓语。