This paper investigates the “gei VP” construction and related questions such as what determines whether gei can be added to a VP and how is it determined what the semantic effect of the addition of gei is. We propose that structures with gei involve an “external force” in the semantics only. The nature of the external force is determined by the type of verb it is added to. Although it can only be added to unaccusative verbs, the effect is not the same in all cases. With V1-V2 combinations in which V1 is not a lexical unaccusative, the external force that is added through the addition of gei is a cause(r). In case a lexical unaccusative verb is involved, the external force is more circumstantial in nature.