So, to realize their dreams, many students try anything.

因此, 許多學生為了實現他們的夢想, 會去嘗試各種方法。

上列句中的to realize their dreams為不定詞片語 (即『to + 原形動詞』), 作副詞用, 修飾全句。不定詞片語作副詞時, 可置於句首或句尾, 用以表示『目的』, 譯成『為了 (要)……』; 置於句首時, 其後通常置逗點, 再接主要子句; 置於句尾時, 則其前不得置逗點。

置於句首:

例: To succeed in life, you must be determined.

　(要在人生的旅途上成功,你必須意志堅定。)

置於句尾:

例: Peter left home early, to avoid the heavy traffic. (╳)

　→Peter left home early to avoid the heavy traffic. (○)

　(彼得提早出門以避開壅塞的交通。)

注意:

表示『目的』的不定詞片語亦可用下列片語取代:

to + 原形動詞　　為了 (要)……

=in order to + 原形動詞

=so as to + 原形動詞

=with a view to + 動名詞

=with an eye to + 動名詞

＊上述片語除了"so as to + 原形動詞"須置於句尾使用外, 其餘均可置於句首或句尾。而在with a view to及with an eye to中的to是介詞, 故其後接動名詞作其受詞, 而不是原形動詞。

　　　(朗恩正在存錢以便能買棟房子。)

Remember,though, you can't always rely on luck.

=Remember, however, you can't always rely on luck.

不過要記住, 你不能永遠靠運氣過日子。

上列句中的though為副詞, 置於句中, 作插入語用, 表『不過』、『但是』, 即等於however之意, 但兩者用法不同。though使用時可置於句中, 作插入語用, 兩旁置逗點, 亦可置於句尾, 其前置逗點; 而however使用時, 則可置於句首, 其後加逗點, 或置於句中作插入語, 兩旁以逗點相隔, 但很少置於句尾使用。

例: Bruce is an American. He, though, acts very Chinese.

　= Bruce is an American. He acts very Chinese, though.

　= Bruce is an American. However, he acts very Chinese.

　= Bruce is an American. He, however, acts very Chinese.

　(布魯斯是個美國人，但是他的行為表現卻非常中國化。)

　Bruce is an American. He acts very Chinese, however. (少用)

注意:

though置於句首使用時, 則為副詞連接詞, 表『雖然』之意, 即等於although, 其所引導的副詞子句修飾句中的主要子句, 兩子句中以逗點相隔, 但此副詞子句亦可置於主要子句之後, 此時兩子句間則不須用逗點。

　  = He's not well liked by his classmates (al)though he is smart.

　(雖然他很聰明,卻不怎麼受同學的喜愛。)