57 带有连词或介词的分词短语 Track55
分词短语可以用在某些连词或介词后面。
（1）连词+分词短语
用在连词后边的分词短语作状语，相当于简化后的状语从句保留了连词。
a. Once deprived of oxygen, the brain dies. = Once it is deprived of oxygen, the brain dies.
一旦缺氧，大脑就会死亡。（once强调时间）
b.Be careful while crossing the road.（while强调时间）
c. After talking to you, I always feel much better.
d. Although exhausted by the walk, he continued his journey.（although强调让步）
e. Although usually living on or under rocks or on coral reefs, marine snails have been observed in a great variety of habitats.
f. Although still running in a number of cities, the electric trolley has for the most part fallen into disuse.
g. After having annoyed everybody, he went home.
他把所有的人都惹烦了之后就回家了。
h. If seen under a microscope, a fresh snowflake has a delicate six-pointed shape. 如果从显微镜下观察，新降的雪花有纤小的六瓣。
但表示原因的分词短语前不能加连词（如 because，for，since，as 等），往往加介词 with。
i. _______the temperature falling so rapidly, we couldn't go on with the experiment.
A. With
B. For
C. As
D. Since
正确答案：A。
（2）介词+分词短语
分词短语表示伴随状况或原因的时候，可加介词with或without。
a.A car roared past, with smoke pouring from the exhaust.
一辆小汽车呼啸而过，排气管冒出一团团黑烟。
b.The old man often takes a walk after supper with his dog following him.
c.She left the party, without a word said .
分词短语表示时间，可以在分词前边加on。
d. On hearing her son's death, the bereaved mother broke out crying. 一听到她儿子死亡的消息，这位母亲放声痛哭起来。（on强调时间，相当于as soon as）
（1）连词+分词短语
用在连词后边的分词短语作状语，相当于简化后的状语从句保留了连词。
a. Once deprived of oxygen, the brain dies. = Once it is deprived of oxygen, the brain dies.
一旦缺氧，大脑就会死亡。（once强调时间）
b.Be careful while crossing the road.（while强调时间）
c. After talking to you, I always feel much better.
d. Although exhausted by the walk, he continued his journey.（although强调让步）
e. Although usually living on or under rocks or on coral reefs, marine snails have been observed in a great variety of habitats.
f. Although still running in a number of cities, the electric trolley has for the most part fallen into disuse.
g. After having annoyed everybody, he went home.
他把所有的人都惹烦了之后就回家了。
h. If seen under a microscope, a fresh snowflake has a delicate six-pointed shape. 如果从显微镜下观察，新降的雪花有纤小的六瓣。
但表示原因的分词短语前不能加连词（如 because，for，since，as 等），往往加介词 with。
i. _______the temperature falling so rapidly, we couldn't go on with the experiment.
A. With
B. For
C. As
D. Since
正确答案：A。
（2）介词+分词短语
分词短语表示伴随状况或原因的时候，可加介词with或without。
a.A car roared past, with smoke pouring from the exhaust.
一辆小汽车呼啸而过，排气管冒出一团团黑烟。
b.The old man often takes a walk after supper with his dog following him.
c.She left the party, without a word said .
分词短语表示时间，可以在分词前边加on。
d. On hearing her son's death, the bereaved mother broke out crying. 一听到她儿子死亡的消息，这位母亲放声痛哭起来。（on强调时间，相当于as soon as）
