STEP3.［典例解析］
1. The secretary worked late into the night, ____ a long speech for the president.
A to prepare B preparing C prepared D was preparing
[解析] 本题考察现在分词作伴随状语用法。分词与逻辑主语之间为主动关系，故选B。
2.____ a reply, he decided to write again.
A Not receiving B Receiving not
C Not having received D Having not received
[解析]分词短语表示的动作在谓语动词之前发生，故用现在分词的完成时态。Not 要放在非谓语动词之前。
3. “Can't you read?” Mary said ____ to the notice.
A angrily pointing B and point angrily
C angrily pointed D and angrily pointing
[解析] 现在分词作伴随状语，分词与逻辑主语之间为主动关系，故选现在分词。 故答案为A。
