안녕하세요. 교수님.

as가 양태 접속사로 사용되면 절구조를 생략하고 병렬시킬 구조만 남길 수 있다는 설명을 들었는 데요. 아래 세 문장의 밑줄 친 부분 모두 그렇게 이해해도

될까요?

1.

Futher into the circular pattern, the wind qucikly turns downward, and an airplane can suddenly lose altitude and possibly crash when it is near the ground, as upon landing.

2.

Silence used to hurts others may also take the form of refusing to acknowledge the presence of another person, as in disconfirmation.

3.

Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries because they are unwilling to have their names entered as having taken out such and such a book for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.