"At," in relation to time, should be used when stating a time something will happen or something has happened.
Examples:
"I will be there at 5:30."
"The train arrived at noon."
Using "at" in a question is unnecessary:
"At what time will you be there?" is better asked as "What time will you be there?"
"At," a preposition, should not be used at the end of a sentence.
English Grammar In Use was created in 1985.
You use English grammar to form sentences and communicate using the English language.
http://www.edufind.com/english/grammar/
H. W. Davies has written: 'An English grammar for...junior classes' -- subject(s): Grammar, English language 'An English grammar for the use of junior classes' -- subject(s): Grammar, English language
The use of good English grammar.
i have been chating with my friend
use of seem in English grammer
"Gramática" in English means "grammar." It refers to the rules and structures that govern the use of a particular language.
John A. MacCabe has written: 'An English grammar for the use of schools' -- subject(s): Grammar, English language
no not really
so you can make plurals
William Harvey Wells has written: 'The Graded School: A Graded Course of Instruction for Public Schools: with Copious Practical ..' 'A grammar of the English language' -- subject(s): Grammar, English language 'A Grammar of the English Language: For the Use of Schools' -- subject(s): Accessible book 'Wells's school grammar' -- subject(s): Grammar, English language