'Happen' in the Bible

So Mary said, "Behold, the Lord's female slave! May it happen to me according to your word." And the angel departed from her.

He will come and destroy those tenant farmers and give the vineyard to others." And [when they] heard [this], they said, "[May this] never happen!"

And they asked him, saying, "Teacher, when therefore will these [things] happen, and what [will be] the sign when these [things] are about to take place?"

And when you hear about wars and insurrections, do not be terrified, for these [things] must happen first, but the end [will] not [be] at once."

But [when] these [things] begin to happen, stand up straight and raise your heads, because your redemption is drawing near!"

But be alert at all times, praying that you may have strength to escape all these [things] [that] are going to happen, and to stand before the Son of Man."

And [when] those around him saw what was about to happen, they said, "Lord, should we strike with the sword?"

For if they do these [things] {when the wood is green}, what will happen {when it is dry}?"