Вивчаючи статистику

may (not), might (not), and could (not) + bare infinitive to talk about possibility or uncertainty in the future:

He could make a total recovery one day.

• 
  may (not), might (not), could (not), must, can’t + be + -ing to talk about things possibly happening at a time in the future:
  

I might be meeting John later.
Alternatives to modals
Adverbs like certainly, probably, possibly, perhaps and maybe can be used to express similar ideas to modal verbs:
He had probably been attacked and robbed. (= he must have been attacked)
We can use it + be + certain/likely/probable/possible/impossible to express ability, probability and possibility:
It is possible to program your computer to translate texts automatically. (= you can program your computer)
It is possible that the train will be late. (= the train might be late)


Note how the tenses of the infinitive are formed:
Present simple: (to) cook
Present continuous: (to) be cooking
Present perfect simple: (to) have cooked
Present perfect continuous: (to) have been cooking


UNIT 10. Reporting Speech
Reported speech is the exact meaning of what someone said, but not the exact words. We do not use quotation marks. The word that can either be used or omitted after the introductory verb (say tell, suggest, etc). He said (that) he would come home before 9 o'clock.
Say - Tell
say + no personal object She said she was very angry.
say + to + personal object She said to us she was very angry
tell + personal object She told us she was very angry.
Expressions used with say, tell and ask.

Say	hello, good morning/afternoon, etc, something/ nothing, so, a prayer, a few words, no more, for certain/sure, etc
Tell	the truth, a lie, a story, a secret, a joke, the time, the difference, one from another, somebody one's name, somebody the way, somebody so, someone's fortune, etc
Ask	a question, a favour, the price, after somebody, the time, around, for something/somebody, etc

Reported Statements

• 
  In reported speech, personal/possessive pronouns and possessive adjectives change according to the meaning of the sentence.
  

Peter said, "I'm having my car serviced." (Direct statement)
Peter said (that) he was having his car serviced. (reported statement)

• 
  We can report someone's words either a long time after they were said (out-of-date reporting) or a short time after they were said (up-to-date reporting).
  

Up-to-date reporting

The tenses can either change or remain the same in reported speech.