英語六級-完形語法關(guān)鍵句368. His first lecture was delivered on Nov. 4

368. His first lecture was delivered on Nov. 4, 1915, and it explained his new approach, though he admitted he did not yet have the precise mathematical formulation of it.

譯文　雖然他承認他尚未有精確的數(shù)學(xué)公式，但他還是在1915年11月4日發(fā)表了他的第一個演講，并且解釋了他的新方法。

點睛　deliver本義為“交付，遞送”，在句中意為“發(fā)言，發(fā)表”。precise意為“精確的，準(zhǔn)確的”。though意為“盡管；雖然”，引導(dǎo)讓步狀語從句。除此之外，讓步狀語從句的引導(dǎo)詞還有although和as。

考點歸納　although、though和as三者的聯(lián)系與區(qū)別如下：

although和though引導(dǎo)的從句放在主句前后均可，有時還可放在句中。如：

1) Although many difficulties are still ahead, we are determined to make greater achievements. 盡管前面的道路還充滿了坎坷，但是，我們決心要取得更大的成就。

2) He often helps me with my English (al)though he is quite busy. 盡管他很忙，但是還常常幫我學(xué)英語。

although和though引導(dǎo)的從句不能與but或however連用，但可與yet或still連用。如：

Though he was old, yet he worked hard. 盡管他上了年紀(jì)，但是工作依然很努力。

though有時指假設(shè)的情況，從句用虛擬語氣；although卻不能這樣用。如：

1) Einstein cared little for money, though he could have been very rich. 盡管愛因斯坦本可以成為非常富有的人，但他對金錢卻不感興趣。

2) He will never do such a thing though he (should) be forced to. 即使強迫他，他也決不會干這樣的事。

though引導(dǎo)的從句若是系表結(jié)構(gòu)，且從句的主語與主句的主語一致時，可以省略從句主語和be動詞。如：

Though alone, he is happy. 雖然他獨自一人，卻很幸福。（完整形式是Though he is alone, he is happy.）

as和though引導(dǎo)的讓步從句都可以將表語、狀語或部分謂語提前。如：

Try hard as he will, he never seems able to finish the work before Friday. 盡管他會很努力，但是看起來他并不能在周五前完成此項工作。