hello..could you please tell me how we say in turkish : "how could you trust him...he did the same thing ,every summer, to others too "  

how could you trust him...he did the same thing ,every summer, to others too

nasıl (how), güvenmek (to trust)

Ona nasıl güvenebildin? (How could you trust him?)

her (every), yaz (summer), aynı (same), şey (thing), diğer (other), diğerleri (others, other ones), de (as well, too, also)

Diğerlerine de her yaz aynı şeyleri yaptı. (Every summer, he did the same things to others too.)