'Happen' in the Bible

So I said to myself, “What happens to the fool will also happen to me. Why then have I been overly wise?” And I said to myself that this is also futile.

I have seen that there is nothing better than for a person to enjoy his activities because that is his reward. For who can enable him to see what will happen after he dies?

For who knows what is good for man in life, in the few days of his futile life that he spends like a shadow? Who can tell man what will happen after him under the sun?

Yet no one knows what will happen because who can tell him what will happen?

Again I saw under the sun that the race is not to the swift, or the battle to the strong, or bread to the wise, or riches to the discerning, or favor to the skillful; rather, time and chance happen to all of them.

Yet the fool multiplies words.No one knows what will happen,and who can tell anyone what will happen after him?

Give a portion to seven or even to eight,for you don’t know what disaster may happen on earth.