About -Not Exactly
Eg:Its about 5 miles to Town.
About To -Talking about to a subject.
Eg:What are you talking about to?
Be about to -Going to do something soon.
Eg:I am about to sleep.
Be not about to -Determination
Eg:I am not about to stop studying English in the class.
Just -Exactly
Eg:Just 2 dogs(Exactly 2 dogs)
Only -Limited to
Eg:There are only limited tigers are left.
Barely -Very little or Scared.
Eg:I barely have enough money to eat.
I barely enough money to pay for the car.
Merely -Nothing more than or nothing limited(Only)
Eg:I merely touch , it broke.
Its merely a wound ,nothing much.
Until -
you cannot leave the office until you finish this work.
Still -
It had been raining still last night.
Yet -
I did not eat lunch yet.
Though/Although -
Though/Althow the exam was tough,But I thing he did well.
Eventhough -
Eventhough the exam was easy I failed.
Despite -
Despite his best effort ,he could not succeed.
In Spite of -
In spite of his best effort the man could not succeed.
Too much - Uncountable
Eg:I have too much suger.
I have to done too much home works.
Too many -Countable.
Eg:There is too many people for the movie.
Too much and too many are using for expressing' the -ve things or bad things"
A lot of -It has the same meaning of Too much and too many but it using it both countable & uncountable nounsfor good(+ve) things.
Eg:I have a lot of money.
I have a lot of books.