Not many volunteers came to their rescue.

　　来帮助他们的志愿者不是很多。

　　I won't go to the party unless I'm invited.

　　除非被邀请，否则我不会去参加聚会的。

　　 [即时演练1]

　　(1)选词填空

　　①(2016·江苏高考改编)He did not compromise easily, but was willing to accept any constructive advice for a worthy cause.(not/no)

　　②(重庆高考改编)A smile costs nothing,_but gives much.(nothing/something)

　　③(江西高考改编)My brother would like to buy a good watch but none was available from that shop.(nothing/none)

　　(2)用否定词翻译句子

　　①没人同意这个建议。

　　No_one_agrees_to_the_suggestion.

　　②什么也改变不了我的主意。

　　Nothing_can_change_my_mind.

　　③我从来都没有见过他。

　　I_have_never_seen_him.

　　2．可以用hardly, scarcely, seldom, little, few等半否定词来表达否定之意。

　　Now she hardly had strength to open the carriage door.

　　此刻她几乎没有力气打开车厢的门。

　　Unfortunately, very few people have played in this space.

　　遗憾的是，只有极少数的人涉足这个领域。

　　[即时演练2]

　　选词填空：little/hardly/seldom/few

　　①I had hardly closed my eyes when I remembered I hadn't done my maths homework.

　　②I have few friends in the new school.

　　③Mr.Smith seldom goes back to his hometown.

　　④I have only a little money left.

　　3．可以用含否定意义的前缀a­， ab­， an­， de­， dis­， il­， im­， in­， ir­， non­， un­， under­等构成的词表达否定之意；也可以用后缀­less, ­free, ­proof等构成的词表达否定之意。

　　Today it is impossible to cure cancer completely.

　　目前要完全治愈癌症是不可能的。

Second, it is also useless to worry about the future.