That took you ten years to realise? I hope you're not paying for your classes.

There is no rule about using singular or plural with any. Example: Any student who wishes to learn will have to study. Any students who wish to learn will have to study. Here are the rules for you to make nouns plural Rule 1: Add an -s to make a plural of most words. 1. star --- stars 2. pencil --- pencils 3. book --- books Rule 2: For words that end in a "hissing sound (-s -z -x -ch -sh) add an -es to the word. 1. kiss --- kisses 2. hex --- hexes 3. match --- matches Rule 3: For words that end in a vowel plus -y (-ay, -ey, -iy, -oy, -uy) add an -s to the word 1. boy --- boys 2. day --- days 3. pulley --- pulleys Rule 4: For words that end in a consonant plus a -y, change the -y into -ie and add an -s. 1. theory --- theories 2. lily --- lilies 3. empty --- empties Rule 5: For words that end in -is. change the -is to -es to make the plural 1. thesis --- theses 2. oasis --- oases 3. analysis --- analyses Rule 6: Some words that end in -f or -fe have plurals that end in -ves. 1. elf --- elves 2. calf --- calves 3. shelf --- shelves

No rule. Any questions? ;-)

LZ你应该把这个问题发到学英语的板块去比较好些...这个板块是学中文的哈