the goal was to collect data on a european scale.这里be动词后面跟不定

英语翻译1.A survey to collect data on the entire population isa. He is on the way .后面跟动词不定是还是什么? I was crossing the bridge 这里Was是BE动词 后面应该是 aross 为什么这里用 Cros be动词后面跟动词? 求英语翻译：On another scale ,the storm was ranked a three on a sc he was a scale one在这里是什么意思呢?scale在这里应该怎样理解? a numberof ,the number of的区别,他们后面BE动词跟单数还是复数? on one way to 的后面可以跟动词吗 be able to后面跟多个动词的用法? TO BE后面可以直接跟动词原形吗 The goal of all will be to try to explain to a confused and a set of keys 后面be动词用啥 A set of keys ( )(be) on the floor