kawari aeba
1. If/when substituted; If/when replaced
Verb
#304093
1. If/when substituted; If/when replaced
1. to relieve each other; to take turns (to do)
1. Don't have to reciprocate.; No need to return the favor.
1. Can substitute; Can replace
1. Complete substitution; Perfect replacement
1. Looks interchangeable.; Seems replaceable.
1. Being substituted for each other; Exchanging roles
1. Seems they switch.; Apparently they alternate.
1. Don't switch.; Don't exchange.
1. Could not exchange.; Was not substituted.