some students in shanghai have had e-bags for several months为什么用 have had

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some students in shanghai have had e-bags for several months为什么用 have had
some students in shanghai have had e-bags for several months
为什么用 have had

some students in shanghai have had e-bags for several months为什么用 have had
本句使用的是现在完成时,现在完成时由"have+过去分词"构成.
现在完成时的使用有两种情况：
1.动作在说话之前已经完成,对说话当时已经产生影响,例如：
He has gone to Japan.(他已离开,产生的影响是他此时不在本地.)
I have had breakfast.(我吃过早餐,产生的影响是此时我不饿或者很饿,要看说话当时的情境或语境.)
2.状态在说话之前已经开始,持续到现在,或许还会持续下去.例如：
He has studied English for 5 years.("study English"的状态持续到现在,也许还在继续)
Now I have finished the work.("finish the work"的状态持续到现在,不再继续)
“Some students in shanghai have had e-bags for several months.”属于第二种情况,"have e-bags"这种状态到目前为止已经持续了一段时间“for several months",并且可能还在继续.

Some students [ ] in the classroom There have some students in the classroom/ Some students are in the room.(对划线部分提问）划线部分是Some students there are some students in the hall(划线提问一般疑问句否定回答)some students 划线 There are some students in the classroom,______反义疑问句改为否定句 There are some students in the classroom. There are some students in the ciassroom ,（）（ (反义疑问句) are there some students in the classroom找错误改正 There are some students in the classroom (改为否定句) There are some students in the classroom.否定句 1 ( )1.There are students in the classroom.A.some Some students feel s__ in class on Monday morning. some students are in the classroom 改否定句 Are there some students in the library?哪里错了? There are some students in the canteen.{否定句 Some more students _(be) in the room.怎么填 Some boy students are in the classroom改为同义句 Some students are in the playground.Some are in the school()(图书馆）