You didn't specify what your questions are.
Take a look at this. I think this will help.
One example would be, for example, in French, the present perfect tense is used to talk about past events. In English, the simple past tense is used to talk about past events.
French speakers will transfer the rules in French to English and say, "Yesterday, I have visited my friends" (French rule) instead of "Yesterday, I visited my friends (English rule).