他的病让身体很虚弱。

(2) It seems (that/as if)... 似乎

此句型实质上是"主＋系＋表"结构。其中it是人称代词，并无实意，指的是某种情况，seems为系动词，that / as if 引导表语从句。

1) It seems that ...表示"看起来......"。强调根据一定的事实所得出的一种接近于实际情况的判断，可以说表示事实。（可以转换成"名词或代词 ＋ seem ＋动词不定式"句型，其意不变，如果动词不定式为to be ＋ 形容词时，to be往往省略。）

【例句】It seems that it is more difficult for women to get to the top of the company. 妇女似乎更难提升到公司的最高职位。

2) It seems as if ...也表示"看起来......，似乎......"。使用该句型表示可能：若从句表示的是很可能实现的事情，从句谓语用陈述语气；若从句表示的是与事实相反的假设或实现的可能性很小的事情时，则从句谓语要用虚拟语气。

1、从句的谓语动词常用虚拟语气来表示所设想的事情不真实或不可能发生/存在。

【例句】It seemed as if the good man were trying to teach us all he knew at this last lesson.这个好心人仿佛要在最后这一堂课上把他的全部知识教给我们。

It seems as if it were autumn. 现在仿佛是秋天似的。

2、如果可能性很大则用陈述语气，或者句中的情况可能发生或可能被设想为真实，则仍然用陈述语气。

It seems as if our team is going to win.看来我们队要胜了。

(3) But what I remembered most is moving a lot.

what I remembered most是一个what引导的主语从句。

在句中充当主语的从句叫做主语从句。

【例句】

That he finished writing the composition in such a short time surprised us all.

Whether we will go for an outing tomorrow remains unknown.

Who will be our monitor hasn't been decided yet.

Whom we must study for is a question of great importance.

What caused the accident remains unknown.

Whatever you did is right.

Whose watch was lost is unknown.