Don’t confuse the adverb maybe (one word), which means ‘perhaps’, with may be (two words), which means ‘could be’:
✗ In an earthquake your house maybe badly damaged.
✓ In an earthquake your house may be badly damaged.
✗ It maybe an unfulfilled dream.
✓ It may be an unfulfilled dream.
Maybe and perhaps have the same meaning, but maybe is used mainly in spoken English and informal writing. In more formal English, perhaps is far more common:
Now, maybe I haven’t explained myself very well.
There are, perhaps, three principles which must be followed.