非謂語動詞的格式化結構總結
三.狀語從句中省略與非謂語形式 在狀語從句中，當主句主語與從句主語相同或從句是it is＋adj.時，常把主語和be動詞省略，之后形成以下的固定結構，在平時訓練時，告訴學生可以直接在下面的三種形式中做選擇。 to do (動作未發性)when/while/unless/if/ though/as if /no mater how…＋ doing （與主語之間是主動關系）
done（與主語之間是被動關系）1.when c different cultures, we often pay attention to the differences without noticing the many similarities. 即：when (we are) comparing different cultures的省略句。
a. compared b. being compared c. comparing d. having compared2.when d help, one often says “thank you.” or “it’s kind of you.” 即：when (one is)offered help的省略句。 a. offering b. to offer c. to be offered d. offered3.①the man we followed suddenly stopped and looked as if d whetherhe was going to the right direction. 即：as if (he is going ) to see whether he was going to the right direction 的省略句。②contrast may make something more beautiful than it is when c alone. 即：when (something is)seen alone的省略句。a. seeing b. having seen c. seen d. to see 總結：在這一結構中，要注意的是主句的主語與從句的主語一定是一致的，否者只能用狀語從句。
4.—what’s the trouble with you?
— d the heavy suitcase, my waist was hurt unexpectedly.
a. while carrying b. carried
c. carrying d while i was carrying 5.①the idea for the machine came to mr baker c to his invention recently.②mr. black had an idea for the machine a/b/c to his invention recently.