Strong's #5600: o (pronounced o)
 the subjunctive of 1510; (may, might, can, could, would, should, must, etc.; also with 1487 and its comparative, as well as with other particles) be:--+ appear, are, (may, might, should) be, X have, is, + pass the flower of her age, should stand, were.
Thayer's Greek Lexicon:
 ̓͂ / ̓͂ / ̓͂ 
 
  ō / ēs / ē 
 
 1) be, may be, etc.
 
  Part of Speech: verb
Relation: the subjunctive of G1510
 
Usage:
This word is used 65 times:
Matthew 6:4: "That thine alms  may be in secret: and thy"
Matthew 6:22: "therefore thine eye  be single, thy whole body"
Matthew 6:23: "if thine eye  be evil, thy whole body"
Matthew 10:13: "the house  be worthy, let your peace come"
Matthew 10:13: "upon it: but  if it be not worthy, let your peace"
Matthew 20:4: "the vineyard, and whatsoever  is right I will give"
Matthew 20:7: "vineyard; and whatsoever  is right, that shall ye receive."
Matthew 24:28: "wheresoever the carcass  is, there will the eagles"
Mark 3:14: "he ordained twelve, that  they should be with him, and that"
Mark 5:18: "prayed him that  he might be with him."
Luke 10:6: "the son of peace  be there, your peace shall rest"
Luke 11:34: "when thine eye  is single, thy whole body"
Luke 11:34: "full of light; but when  thine eye is evil, thy body also"
Luke 14:8: "highest room; lest a more honorable man than thou  be bidden of him;"
John 3:2: "doest, except God  be with him."
John 3:27: "can receive nothing, except  it be given him from"
John 6:65: "come unto me, except  it were given unto him of"
John 9:5: "As long as  I am in the world, I am the light of the"
John 9:31: "but if any man  be a worshiper of God, and doeth his"
John 14:3: "I am, there ye  may be also."
John 16:24: "ye shall receive, that your joy  may be full."
John 17:11: "thou hast given me, that  they may be one, as we"
John 17:19: "myself, that they also  might be sanctified through the truth."
John 17:21: "That they all  may be one; as thou, Father, art in"
John 17:21: "that they also  may be one in us: that"
John 17:22: "have given them; that  they may be one, even as we are"
John 17:23: "in me, that  they may be made perfect in one; and"
John 17:24: "whom thou hast given me,  be with me where I"
John 17:26: "wherewith thou hast loved me  may be in them, and I in"
Acts 5:38: "counsel or this work  be of men, it will come to nought:"
Romans 9:27: "of the children of Israel  be as the sand of the"
Romans 11:25: "of this mystery, lest  ye should be wise in your own conceits; that"
1 Corinthians 1:10: "the same thing, and  that there be no divisions among you;"
1 Corinthians 1:10: "among you; but  that ye be perfectly joined together in the same"
1 Corinthians 2:5: "your faith should not  stand in the wisdom of men, but"
1 Corinthians 5:7: "old leaven, that  ye may be a new lump, as ye are"
1 Corinthians 7:29: "that both they that have wives  be as though they had none;"
1 Corinthians 7:34: "of the Lord, that  she may be holy both in body and"
1 Corinthians 7:36: "his virgin, if  she pass the flower of her age, and need so"
1 Corinthians 12:25: "That  there should be no schism in the body; but"
1 Corinthians 14:28: "But if  there be no interpreter, let him keep silence in the church;"
1 Corinthians 15:28: "unto him that put all things under him, that God  may be all in all."
1 Corinthians 16:4: "And if  it be meet that I go also, they shall go with"
2 Corinthians 1:9: "in ourselves, that  we should not trust in ourselves,"
2 Corinthians 1:17: "according to the flesh, that with me  there should be yea yea,"
2 Corinthians 4:7: "excellency of the power  may be of God, and not of"
2 Corinthians 9:3: "that, as I said,  ye may be ready:"
2 Corinthians 13:7: "should do that which is honest, though we  be as reprobates."
2 Corinthians 13:9: "are weak, and ye  are strong: and this also"
Galatians 5:10: "he that troubleth you shall bear his judgment, whosoever  he be."