wasn't didn't isn't的用法 各举两个例子

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 16:21:30
wasn't didn't isn't的用法 各举两个例子

wasn't didn't isn't的用法 各举两个例子
wasn't didn't isn't的用法 各举两个例子

wasn't didn't isn't的用法 各举两个例子
1.wasn't是be动词isn't的过去时,用于过去进行时.
如：1.he wasn't at home yesterday.
2.I wasn't doing my homework yesterday,I was reading books.
2.didn't是“do" "does"的过去时,用于过去现在时.
如：1.I didn't go to the library last week.
2.he didn't take a shower until his mother came back.
3.isn't是一般现在式,后面一般加动词--ing形式
如：1.he is dancing in the gym
2.is she playing football on the playground?

先说wasn't和isn't
着两个都是be 动词.只是时态不一样.
前者用语一般过去,后者用于现在时态.
都表否定.
通常根据句子意思来确定时态.
例如:I wasn't in the hospital yesterday. 我昨天没有在医院(过去)
She isn't a good girl. 她不是一个好女孩(目前的情形)

全部展开

先说wasn't和isn't
着两个都是be 动词.只是时态不一样.
前者用语一般过去,后者用于现在时态.
都表否定.
通常根据句子意思来确定时态.
例如:I wasn't in the hospital yesterday. 我昨天没有在医院(过去)
She isn't a good girl. 她不是一个好女孩(目前的情形)
再说didn't
是“do" "does"的过去式,是助动词。
用法和do,does一样
只是要根据时态人称来变化。
例如：He didn't buy that expensive book.他没有买那本昂贵的书
上一楼举的例子也不错，你可以参考一下
希望你有所收获

收起

wasn't didn't isn't的用法 各举两个例子 aren't/didn't/isn't you?他们的区别 didn't notice 与 wasn't noticing 的区别 here used to be a tea house near the shcool,--------there?isn't didn't wasn't hadn't here used to be a tea house near the shcool,--------there?isn't didn't wasn't hadn't Look!Somebody has broken a glass.Well,it---me.I--that.A.wasn't;didn't do B.isn't;haven't done C.wasn't;hadn't done D.isn't;didn't 怎么百度上的正确答案是A,我们书上确是D啊,真是晕了, there used to be a hospital here,________?A isn't thereB wasn't itC didn't itD wasn't there A car knocked down a little boy just now.Luckily,he___at all.A.wasn't hurtB.didn't hurtC.wasn't hurtedD.isn't hurted原因 -Look at the sign smoking isn't allowed here.__oh,sorry,I___itA don't notice B.didn't notice C wasn't moticing D couldn't notice Look!Somebody has broken a glass.Well,it__ me.I__ that.A.wasn't;didn' doB.isn't;haven' doneC.wasn't;hadn't doneD.isn't;didn't do为什么前面一个空格用现在时呢?后面的为什么用助动词呢? 写出下列动词的完全形式can't i'd aren't they're let's wasn't that's don't when's didn't you're写出下列动词的完全形式can't i'd aren't they're let's wasn't that's don't when's didn't you're doesn't he's she's i'm isn't i've shouldn he ()any classes last week.A.doesn't have B.didn't have C.isn't have D.wasn't have I____think it____a good idea for her to copy myhomework.A./;isn't.B.don't;was.C.didn't;was.D./;wasn't求翻译 There used to be a tea house near the school,____ there?A.isn't B.didn't C.wasn't D.hadn't 英语 —Look at the sign on the right.—Oh,parking ____________hereA.doesn’t allow B.isn’t allowed C.didn’t allow D.wasn’t allowed this machine__.it has not worked for yearsA didn't work B wasn't workingC doesn't workD isn't working There used to be a tes house near the school ,____there?A.isn't B.didn't C.wasn't D.hadn't He used to be a teacher,( A.isn't he B.doesn't he C.didn't he D.wasn't he