请教seem的用法,以前的讨论没有结论

seem的用法有以下几种:

seem that

seem to do

seem to be+n.

seem +n.

我想请教的是最后两种:什么时候加to be,什么时候不加?例题如下:

大全753,答案A:

The filibuster, a parliamentary device that slows the snail’s pace that prevails even in the best of times in congressional sessions and tests the endurance of everyone associated with it, seems more and more an anachronism in the age of telecommunications.

(A) sessions and tests the endurance of everyone associated with it, seems

(B) sessions and tests the endurance of everyone who is associated with it, seeming to be

(C) sessions, tests the endurance of everyone associated with it, seems

(D) sessions, that tests the endurance of everyone associated with it and seems（A）

(E) sessions, testing the endurance of everyone associated with it and seeming

另外一题:

37. Seeming to be the only organization fighting for the rights of poor people in the South, Hosea Hudson, a laborer in Alabama, joined the Communist party in 1931.

(A) Seeming to be

(B) As

(C) In that they seemed

(D) Since it seemed（E）

(E) Because it seemed to be

Choice A and B wrongly identify Hosea Hudson, not the communist party, as the organization under discussion. In choice C, the plural pronoun they does not agree in number with the singular noun party. In that in C and Since in D are less direct and idiomatic than Because in this context, and to be is needed to complete the predicate begun by seemed. E is the correct answer for this question of middle difficulty.

刚才查了一下，再联系一下上面的题目，有以下思考：

n.+seem to be N+modifier通常用于强调N的性质，n和N是同一种事物

n.seem+ N.通常用于强调n和N的类似，前后是不同的事物