Travellers _____ to use mobile phones while flying.[ ]A. don't allow B. aren't allowedC. won't allow D. didn't allow-九年级英语
构成
举例
一般情况
词尾+s
动词原形
第三人称单数
work(工作)
stop(停止)
works
stops
以-ch, -sh, s, x, o结尾
词尾+es
teach(教)
wash(洗)
dress(装扮)
fix(安装)
go(去)
teaches
washes
dresses
fixes
goes
以“辅音字母+y”结尾
变y为i,再加es
fly(飞翔)
try(尝试)
flies
tries
特殊变化的词:
be (是) - am,is,are
I am
she/he/it,名词单数都用 is
we,you,they,名词复数都用are
have (有) - have,has
I,we,you,they,名词复数都用have
she/he/it is,名词单数都用 has
助动词,不论单复数、不论什么人称都没有变化,都用 can,may,must,need,ought to 等。
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上一篇:Few students can understand the sentence until it _____ twice or three times.[ ]A. explains B. is explainedC. will be explained D. has explained-九年级英语
下一篇:—This kind of rice tastes nice.—Yes, it _____ in northeast of China.[ ]A. was grown B. has grown C. is grown D. is growing-九年级英语
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