These are more commonly called "phrasal verbs". Is there any reason why you chose passive voice? Active voice is much more natural.
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AlpheccaStars#4 - A hundred more were coming across when the road was laid.In BrE, 'come across can mean 'discovered'. If the things referred to were ancient artifacts, skeletons, etc, 'were come across' is just about possible.
AlpheccaStarsThese are more commonly called "phrasal verbs".