1. I run 50 meters in 9 seconds.
2. I run for 50 meters in 9 ceconds.
3. I run 50 meters within 9 seconds.
4. I run 50 meters during 9 seconds.
5. I run 50 meters during the period of 9 seconds.
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Can we use both #1 and #2?
What about #3? Is #3 similar to #1 in meaning?
Can we use #4 and #5 as the same meaning?
Do you frequently omit 'for' in Sentence 2?
1 answer
#1 is best. Don't use the others.