1. He is using the computer.
2. He is working on the computer.
3. He is working at the computer.
(Which one is correct? What is the corrct preposition?)
4. The round trip air fare is one of the cheapest one.
5. The one way ticket to the country is very expensive.
6. The plane will be convenient because I have to pay expensive air fare.
7. The Korean Air Line is not so expensive, but, anyway, we have to pay about 800,000 won for round trip air fare.
(Would you check the english expressions, please?>)
1-3 - All are correct.
4 - OK except for the last word -- should be "ones."
5 - the word "one-way" needs a hyphen
6 - OK
7 - Remove "The" before "Korean" and the comma after "but" - everything else is fine.
In #1, if he is using the computer, he is "typing" so to speak. If he is working on the computer he may be doing the same thing OR he is fixing some part of the computer.
4. "one" of implies the noun must be plural = one of the cheapest ones. And "round-trip" is hyphenated when used as an adjective.
5. also "one-way " modifying the noun "ticket."
Sra
1. All three options are grammatically correct, but the choice of preposition depends on the intended meaning.
- "He is using the computer": This implies that he is simply using the computer, not necessarily completing any work or task on it.
- "He is working on the computer": This suggests that he is actively engaged in work or a task on the computer.
- "He is working at the computer": This implies that he is physically present at the computer and possibly engaged in work or other activities nearby.
4. The correct sentence would be: "The round trip airfare is one of the cheapest." Remove the second "one" after "cheapest" as it is redundant.
5. The correct sentence would be: "The one-way ticket to the country is very expensive." Use hyphens to connect "one" and "way" as they form a compound adjective describing the ticket.
6. The sentence is incorrect and can be revised to: "The flight will be convenient because I don't have to pay for an expensive airfare." Clarify that the convenience is due to not having to pay a high airfare.
7. The sentence is correct, but it can be improved for clarity. Revised version: "Korean Air Line is relatively inexpensive, but we still have to pay about 800,000 won for the round trip airfare." Specify that the mentioned cost is for the round trip airfare.