0There are two s'es in the sentence. )02br 02b 0-
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01cite10Pter12cite10Hi Yoong Liat,12br11b00What I've found s
12br
10May I ask why you think it should be s's and PS's?12br
12br
10For the second one, style guides I read do not recommend using apostrophe for plurals of abbreviations although some people do use them.12blockquote
01cite10Pter12cite10Sorry Yoong Liat, I think I didn't made it clear. The abbreviation of PS was made up arbitrarily. I didn't mean postscript. I could have used anything like BS, CS, DS, etc. in my question.12br
12br
10Back to my original question. What I would like to ask is whether I should use "s" or "es", i.e. the c
01cite10Yoong Liat12cite102a. There are two s's in the sentence. (11b10The modern tendency is to add 11i10-s12i10 to pluralise a word. However, the 11i10-'s12i10 is still common. I would write 11i10s's 12i10because11i10 ss12i10 looks odd.)