I've never ... to youThis phrase is usually followed by a past participle, as in «Je ne te l'ai jamais dit» (I've never told you). In «Je ne te l'ai jamais vu faire», it means “I've never seen you do it.”
FR: Je ne te l'ai jamais expliqué, mais c'est important pour moi.
EN: I've never explained it to you, but it's important to me.