Your first sentence should read "I came TO the mountain." It means "I arrived there." To get something with almost the same meaning, you could say "I went to the mountain." In fact, the latter sounds better to me.
Your second sentence means that "I was at the mountain, and I jumped (or leaped) over the top of it."
It depends on the context that it is being used in. Does not really have the same meaning. I guess you could say, "jump over" in terms of telling someone to come, but this isn't used very often. Even if it was it would be slang and not very proper.
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No, they don't mean the same thing.
Your first sentence should read "I came TO the mountain." It means "I arrived there." To get something with almost the same meaning, you could say "I went to the mountain." In fact, the latter sounds better to me.
Your second sentence means that "I was at the mountain, and I jumped (or leaped) over the top of it."
It depends on the context that it is being used in. Does not really have the same meaning. I guess you could say, "jump over" in terms of telling someone to come, but this isn't used very often. Even if it was it would be slang and not very proper.
Hope this helps
words only mean what their contexts mean. Do you have access to a thesaurus?
What does "I came the mountain" mean anyway. It doesn't seem to be standard English.