落雨時見你冇帶傘，想順路遮埋你過地鐵站。「遮埋你」英文點講?

Some possible ways of speaking :
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It is raining and you don't have an umbrella,
I just want to share my umbrella with you to the MTR station.

Seeing that it is raining and you don't have an umbrella ,
I would like to give you a lift with my umbrella to the MTR station.

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「遮埋你」
= to share my umbrella with you , or
= to give you a lift with my umbrella

與你共用雨傘==to share the umbrella with you. Yip