英文中加"s"的問題。

正確的是:

1) The size of gem is 1mm (因為gem只是一個所以用 is)
7) The size of gems are 1mm (因為gems有多一個所以用 are )
8) The sizes of gems are 1mm (因為sizes 同 gems 都也指多一個所以用 are )

2007-07-15 07:13:19 補充：
咁如果要講範圍由1mm 至2mm的話就應該要講:The size of gems are between 1mm to 2mm. 因為 gems 有個s就以經話比人知有多一個, 而主題是圍繞住size, 而個尺寸以經有埋, 所以可加個between字便可.

1> is correct it means the size of ONE gem

3> IS CORRECT IT MEANS THE SIZE OF ALL GEMS

5> IS WRONG BECAUSE SIZE AND GEM ARE SINGULAR SHOULD BE REWRITTEN AS SENTENCE 1

7> WRONG BECAUSE THE SUBJECT OF SENTENCE IS SIZE NOT GEMS SO SHOULD BE REWRITTEN AS SENTENCE 3

2+4+6+8 ALL WRONG BECAUSE ALL GEMS ARE 1 MM SO THERE IS ONLY ONE SIZE NOT "SIZES"