Hi,
- It is too hot today. (Incorrect)
- It is very hot today. (Correct)
Why is the first sentence incorrect?
Many thanks.
Where I am at the moment, they are both incorrect - it’s absolutely freezing here! Brrrrr.
However, I don’t see anything grammatically wrong with either sentence
Untaught,
(1) I do not know whether “It is TOO hot today” is “incorrect,” but I can understand if a teacher suggests NOT using it. Why? Because when
learners use it, they usually mean “very.” (Wow! It’s very hot today, isn’t it!)
(2) When you use “too,” native speakers often expect you to explain some more.
(3) Study these two examples from Michael Swan’s PRACTICAL ENGLISH USAGE:
(a) It was VERY cold, but we went out.
(b) It was TOO cold TO GO OUT, so we stayed at home. (You are explaining why you did not go out)
(4) I made up these examples. I hope that I am correct:
Mother: How was the test at school today?
Son: It was VERY difficult, but I’m sure that I passed it.
Mother: How was the test at school today?
Son: I’m sorry, Mother. The test was TOO difficult TO PASS. I failed it!
(5) As I said, “It is too hot today” could be “correct” in some situations. (Again this is only my example)
Joe: Hey, dude, do you want to go to the park and play some basketball?
Tony: No way!
Joe: Why not, dude?
Tony: It’s too hot today. (What Tony meant was: It is too hot TO GO TO THE PARK AND PLAY SOME BASKETBALL, but it is not necessary to repeat those words, for Joe will understand what Tony means.)
Thank you, James M. 
Hi Untaught,
Although ‘too + adjective’ without a follow on ‘to do something’ may be less than perfect, I would accept it as suggesting ‘for me’. At the same time ‘so + adjective’ usually requires a follow on as in: It was so hot that I couldn’t work.
Alan
Thank you, Sir Alan.
You are very welcome. And thank YOU for your courteous note.