it 's difficult for children in the poor area to cross the river.yes,that 's trre ,there should be a bridge over the river.请问这个句子中be 情态动词后要跟动词原形,可为什么都是跟be 比如 do you like the coffee?it's very nice

it 's difficult for children in the poor area to cross the river.yes,that 's trre ,there should be a bridge over the river.请问这个句子中be 情态动词后要跟动词原形,可为什么都是跟be 比如 do you like the coffee?it's very nice
it 's difficult for children in the poor area to cross the river.yes,that 's trre ,
there should be a bridge over the river.请问这个句子中be 情态动词后要跟动词原形,可为什么都是跟be 比如 do you like the coffee?it's very nice ,but it will be much better with some milk in it.这句里的be 呢

it 's difficult for children in the poor area to cross the river.yes,that 's trre ,there should be a bridge over the river.请问这个句子中be 情态动词后要跟动词原形,可为什么都是跟be 比如 do you like the coffee?it's very nice
be也是动词的一种,叫做状态系动词,是状态系动词is和are 的原形.情态动词后应该跟动词原形,本来正常时态（一般现在时）的句子应该是There is a bridge over the river.用should是想要表达应该有的意思,所以在原句基础上加上should,变为There should is a bridge over the river,但是因为情态动词后面要跟动词原形,所以就要把is变成它的原形be.第二句也是同理,本来原句是it is much better with some milk in it,但是是要表达将来的意思,翻译过来就是,加些牛奶它（咖啡）将会更好一些,所以就变成it will is much better with some milk in it.同理will后面要跟动词原形,所以要把is变成原形be.

there be 固定句型 某处有某物 并且be为动词is/are的原形
情态动词接动词原形，很对，，为何都是跟be，说明你见的少了，该多阅读，如：you should go.（你得走了），就是动词原形了！！！
希望能帮到你！ ^_^it will be much better with some milk in it.这句里的be 呢此句子中be就是一般的用法，做系动词，...

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there be 固定句型 某处有某物 并且be为动词is/are的原形
情态动词接动词原形，很对，，为何都是跟be，说明你见的少了，该多阅读，如：you should go.（你得走了），就是动词原形了！！！
希望能帮到你！ ^_^

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这是there be 句型

be就是动词原形。它的延伸形式有现在时的 am is are 过去式有was were 进行时有being 完成时有been.
there should be a bridge over the river 中的should be 是情态动词加动词原形的用法。
it's very nice ,but it will be much better with some milk ...

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be就是动词原形。它的延伸形式有现在时的 am is are 过去式有was were 进行时有being 完成时有been.
there should be a bridge over the river 中的should be 是情态动词加动词原形的用法。
it's very nice ,but it will be much better with some milk in it 中的will be也是 态动词加动词原形的用法，也可理解为将来时的固定结构 will+动词原形

希望我的答案令您满意！

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be为动词is/are的原形