打字猴:1.704963736e+09
1704963736
1704963737 variety前还可有修饰语:
1704963738
1704963739 A great variety of animals survive there.那里存留下来许多品种的动物。
1704963740
1704963741 The library has a wide variety of books.这家图书馆有许许多多种类的书。
1704963742
1704963743 There was a considerable variety of opinions.有相当多不同的意见。
1704963744
1704963745 张道真英语用法(大众珍藏版·第二版) [:1704917919]
1704963746 896 Verb
1704963747
1704963748 动词有许多种类,主要有下面这些。
1704963749
1704963750 规则动词与不规则动词:
1704963751
1704963752 这主要从词形上考虑,凡是加-ed方式构成过去式及过去分词的为规则动词,以其他方式构成过去式及过去分词者为不规则动词:
1704963753
1704963754 规则动词 不规则动词 wash (washed, washed) go (went, gone) live (lived, lived) do (did, done) study (studied, studied) come (came, come) 英语中大部分动词都是规则动词。不规则动词只有一百多个,但它们大多是些常用动词,是比较活跃的。因此要学好英语,最好把这些不规则动词的三种形式(如do did done,go went gone,bring brought brought,buy bought bought)都一一背熟。这是掌握各种时态、语态的第一步。同时还要知道-s,-ing,-ed等词尾的加法。这里把几种词尾的加法归纳如下(所用动词都是规则动词):
1704963755
1704963756
1704963757
1704963758
1704963759 ▲ 下面以e结尾的动词,在加-ing时,不必去e,而直接加上去:
1704963760
1704963761 hoe—hoeing
1704963762
1704963763 dye—dyeing
1704963764
1704963765 tiptoe—tiptoeing
1704963766
1704963767 eye—eyeing
1704963768
1704963769 age—ag(e)ing
1704963770
1704963771 ▲ 以“单元音+辅音结尾”的重读音节,加-ing和-ed时,末尾的辅音字母也要双写:
1704963772
1704963773 prefer—preferring—preferred
1704963774
1704963775 permit—permitting—permitted
1704963776
1704963777 ▲ 在英式英语中,像travel,quarrel这种以l结尾的词,加词尾时,l也要双写:
1704963778
1704963779 travel—travelling—travelled
1704963780
1704963781 quarrel—quarrelling—quarrelled
1704963782
1704963783  但美式英语中,l却不双写。
1704963784
1704963785 ▲ 在英式英语中,有时在美式英语中,下列词加词尾时,末尾字母也双写,尽管这个音节不重读:
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