Let’a learn about the double meaning of "다 왔어”

1. First meaning : Everyone ia here (모두 다 모였어)

* 다 : [=모두; 남김없이] all togather

* 오다 : come; show up; get to someplace

* 왔다 : came here; turned up <— 오(the stem of 오다) + -왔(a particle makea a verb past tense) + -다(a basic verb ending suffix)

* 왔어 : 오(the stem of 오다) + -왔(a particle makea a verb past tense) + -어(a informal non-honourific  verb ending suffix)

2. Second meaning : We’re almost there (거의 다 왔어); "there" can be home; the street, the building, the subway station and so on

* 다 : [=거의; 대부분] almost

* 오다 : come; get to someplace

* 왔다 : get to somplace <— 오(the stem of 오다) + -왔(a particle makea a verb past tense) + -다(a basic verb ending suffix)

* 왔어 : 오(the stem of 오다) + -왔(a particle makea a verb past tense) + -어(a informal non-honourific  verb ending suffix)