"an hour" vs "for an hour"
49564
"wait more than" vs. "wait FOR more than"
16625
"... that had stopped half an hour ago" VS " ... that had stopped half an hour before/earlier"
91066
Difference between "a" and "any"
13139
How many syllables are in the word 'hour'?
38484
Is the phrase "for free" correct?
121601
Difference between the use of "a" and "any" in these examples?
71375
"On tomorrow" vs. "by tomorrow"
155011
"He will come back in two hours" vs. "He will come back after two hours"
100929
Should I use "a" or "an" when I abbreviate a word?
146875
Usage of "for" in this passage
47245
Use of Indefinite Articles(a,an)
110711
Difference between "per" and "a"
19869
Proper usage of "since" and "from" with regard to duration of time
111093
“the” vs. “a/an” + clauses
130510
What is the rule for using "a" or "an" in a sentence?
157879
A tendency to use "a" in place of "an" in American English
26350
"Many a year" vs. "many years"