TOO AND ENOUGH
The adverb “too” express “more than required”.
I’m going anywhere. I’m too tired.
You’ve packed too many things.
Determiner “enough” express “as much as we need or want”.
He’s old enough to understand that money doesn’t grow on trees.
“Too” cannot stand before an expression adjective + noun in singular without adding a preposition before a noun:
This shirt is too small for me.
This is too small a shirt for me.
|too + adjective||It’s too hot outside|
|too many/ few + countable noun (plural)||There are too many girls in this class.|
|too much + uncountable noun||You’ve put too much salt into this soup!|
|too + adjectives + infinitive||I was too sleepy to watch TV.|
|adjective/ adverb+enough||Is it warm enough to walk?|
|enough + countable noun(plural)||Do you have enough chairs for everyone?|
|enough + uncountable noun||Do you have enough room in the car for six kids and a dog?|
|adjective + enough + infinitive||Is she strong enough to lift this box?|
STILL, YET AND ALREADY
Word “still” is used to emphasize the duration of some activity in the described moment.
It appears in questions and affirmative sentences.
Are you still working on this project?
I’m still living in the same house.In questions and affirmative sentences “still” stands in the middle of a sentence – before the main verb.
I was still working when you went to bed.
In negative sentences “still” can appear only with auxiliary verb + n’t,
can’t, haven’t and always stands before an auxiliary verb.
He still hasn’t read your message.
Word “yet“ is used when asking if a particular activity is done or when explaining this activity is not done (though it should be done).
It appears in questions and negative sentences (mostly using Present Perfect tense):
Are you ready yet?
I haven’t had breakfast yet.
“Yet” stands always at the end of questions or negative sentences.
He hasn’t arrived yet.
When asking if some activity still continue and say it is not done, “yet” must/shall be used:
Have you cleaned the window yet?
I haven’t cleaned the window yet.
“Already” is used when talking about something that has happened.
Already stands in the middle of a sentence – before a primary verb.
Has your friend already left?
I’ve already seen this film.
Appear in questions and affirmative sentences (mostly using Present Perfect or Simple Present tenses)
She ‘s already gone.
Don’t tell me the story. I already know it.
When announcing that a particular activity is done, “already” shall be used:
I have already cleaned the window.
We use “any longer/any more” to express that some activity is no longer going on or that something has changed:
The window is no longer dirty.
The window isn’t dirty any longer.
The window isn’t dirty any more.