如何判斷that引導(dǎo)什么從句

that可以引導(dǎo)名詞性從句、定語(yǔ)從句。that引導(dǎo)名詞性從句時(shí)（即主語(yǔ)、賓語(yǔ)、表語(yǔ)、同位語(yǔ)從句），在從句中無(wú)具體含義，只起連接作用，而且在從句中也不作任何句子成分。

that可以引導(dǎo)以下從句

1、用作關(guān)系代詞，引導(dǎo)定語(yǔ)從句 The only thing that I can do is to have a rest . 我唯一能做的事就是休息。

2、用作關(guān)聯(lián)詞，引導(dǎo)名詞性從句

That the earth turns around the sun is known to all. 地球圍著太陽(yáng)轉(zhuǎn)這一點(diǎn)是眾所周知的。（引導(dǎo)主語(yǔ)從句）

It so happens that I know the man. 碰巧我認(rèn)識(shí)那人。（主語(yǔ)從句）

I will see to it that everything is ready. 我會(huì)注意把一切準(zhǔn)備妥當(dāng)?shù)摹?賓語(yǔ)從句)

The trouble is that we are short of money.困難就在于我們?nèi)卞X(qián)。（表語(yǔ)從句）

There is no doubt that he is the best choice for this position. 無(wú)疑，他是這一職位的最佳人選。（同位語(yǔ)從句）

3、構(gòu)成短語(yǔ)，引導(dǎo)狀語(yǔ)從句

Bring it nearer so that I may see it better .拿近一點(diǎn)，好讓我看清楚些。 ( so that 引導(dǎo)目的狀語(yǔ)從句)

She got up early , so that she caught the early bus. 她起得早，所以趕上了早班車(chē)。( so that 引導(dǎo)結(jié)果狀語(yǔ)從句)

In order that everybody should hear him , he spoke loudly. 他大聲說(shuō)話(huà)，為了使大家都能聽(tīng)得見(jiàn)。（in order that引導(dǎo)目的狀語(yǔ)從句）

Now that they have taken matters into their hands the pace of events has quickened.他們既然已著手自己來(lái)處理問(wèn)題，事態(tài)的進(jìn)展也就加快了。（now that 引導(dǎo)原因狀語(yǔ)從句）