In LLPSI Orberg writes: Agricola arans post aratrum ambulat. Aratrum est instrumentum quo agri arantur. Arator duos validos boves qui aratrum trahunt prae se agit.
He explains ‘agit’ as follows:
agere = euntem facere
I know that euntem is a participle of ago, agere.. but how does the grammar of this phrase work? 'To make it (them) walking / going ???
Euntem is a participle of eo, ire.
Facere can be used with a double accusative: “With a double object, to make a thing into something, to render it something” - boves agit = boves euntes facit, “he makes the oxen be going,” “he makes them go”