Yipes! My mistake-- confused by my own language! I thought we were discussing present tenses, and I thought
read was pronounced /ri
![Big Smile [:D]](/emoticons/emotion-2.gif)
/ in your question. OK, in addition to my previous post; I will start again:
She may be reading a history book -- Yes, she herself is perhaps reading; as I wrote before:
now; as we speak or these days; in the process of reading.
She may be read a history book -- here, read
is pronunced /red/ (the past participle); this is passive, and means
that someone else might read to her from a history book. My
time comment remains the same: sometimes; in the future; at an unspecified time (She may be read a book every night by her mother; she may be read a book tomorrow by her teacher).
Still, percentages are not involved, Broken Heart.
And don't confuse may be (modal verb) with maybe (adverb)!