Question

________ warm at night, I would fill the woodstove, then set my alarm clock for midnights so I could refill it.

A．Starying  B．Stayed  B．To stay  D．Stay

Answer 1

 C。考查非谓语动词。不定式做目的状语，给柴炉添柴火的目的是保持暖和，故选择C。

【小窍门】1挑出句子的主干很关键，尤其当句子很长的时候。首先要挑出句子的动词，然后看到底哪个是谓语，这样主干就明了。

2第二步中，我们首先要排除选动词原形的选项。然后看不定式是否恰当，只要是表示目的，选它无疑。否则，就要看分词和主干的主语或宾语是主动还是被动关系。尤其要注意，作状语时，考虑分词能否用完成时。而作定语，切不可用分词的完成时。如：

The international agreement, intended to  encourage children not to smoke and help people to kick the habit, was signed on 27 February.

The manager, having made it clear to us that he didn’t agree with us, left the meeting room.

【句意】为保持温暖，我总是先给柴炉添上柴火，接着设好闹钟，以便半夜能够再添加柴火。