thanghnvn Wrote:sorry, another problem,
regarding while clause, or we can call it ellipsis clause.
ellipsis clause should be placed next to the omitted subject. this point is ilustrated in the question 17 og 13 (take a pdf version of og13 and do searching). in this question choice c and d is wrong for that rule.
this rule is not absolute but is prefered if we have a chance to choose. that is why in this question, "while doing" at the end is acceptable but "although de-ed" at the end in choice c and d of question 17 og 13 are eliminated
pls, confirm my thinking . Thank you Manhantan experts.
Again, elliptical construction is not the issue here. In OG17, you have an issue of making things parallel (using a coordinating conjunction) vs describing an element (using a suboordinating conjuction).