[問題] OG 44

[evelight]

44. Using a Doppler ultrasound device, fetal heartbeats can be detected by the twelfth week of pregnancy.

(A) Using a Doppler ultrasound device, fetal heart-beats can be detected by the twelfth week of pregnancy.
(B) Fetal heartbeats can be detected by the twelfth week of pregnancy, using a Doppler ultrasound device.
(C) Detecting fetal heartbeats by the twelfth week of pregnancy, a physician can use a Doppler ultrasound
device.
(D) By the twelfth week of pregnancy, fetal heartbeats can be detected using a Doppler ultrasound device
by a physician.
(E) Using a Doppler ultrasound device, a physician can detect fetal heartbeats by the twelfth week of pregnancy.

答案是E。看到OG對B的解釋：Choice B contains the same main clause and dangling modifier, now at the end.
我想請教大家一個延伸問題


句型: N1+ V+..... N2, Ving/pp....... .

假設不考慮脫節
這樣的句型是否還有雙向修飾的問題？(不知道修飾的是N1還是N2)

[Pufa]

句型: N1+ V+..... N2, Ving/pp.......

一點小經驗：
Ving大多數都修飾N1，
如果要修飾N2，最清楚的方法還是N1+ V+..... N2, chich V/have pp.......
不過目前還沒看過單獨考這個考點的題目。

[best555tw]

個人覺得有雙向修飾問題
有可能省略連結詞修飾N1
也有可能省略which is 修飾N2