有些动词­ing形式作状语在句中没有逻辑上的主语而独立存在，其形式的选择不受上下文的影响，表明说话者的态度、观点等，被称为评论性状语。常见的有：

　　generally speaking　　　　　　 一般说来

　　strictly speaking 严格说来

　　judging from/by 根据......来判断

　　considering .../taking ... into consideration

　　 考虑到

　　supposing 假设；如果

　　providing 如果

　　assuming 假使

　　Generally speaking, as a foreign language Chinese is more difficult to learn than English.

　　一般地说，作为一门外语，汉语要比英语难学。

　　4．连词＋现在分词

　　由when/while/after/before/once/if/though/unless/as if等引导的状语从句的主语与主句的主语一致时，如果从句的谓语动词是主动语态，则可以省略从句的主语，而保留原连词，形成"连词＋现在分词"的结构形式。

　　Though lacking money, his parents managed to send him to university.

　　＝Though they lacked money, his parents managed to send him to university.

　　尽管他父母缺钱，但是他们还是设法把他送去上大学了。

　　[即时演练3]

　　(1)用所给词的适当形式填空

　　①My wife had a long talk with Sally, explaining (explain) why she didn't want the children to play together.

　　②Judging (judge) from what he said, he wasn't satisfied with my work.

　　③Once losing (lose) this chance, you can't easily find it.

　　(2)句型转换(每空一词)

　　①If it is sunny, we'll go for a picnic tomorrow.

　　→It being sunny, we'll go for a picnic tomorrow.

　　②After she had finished her homework, the little girl began to watch TV.

　　→Having finished her homework, the little girl began to watch TV.

　　③Because they had been warned by the teacher, they didn't make such mistakes.

→Having been warned by the teacher, they didn't make such mistakes.