请写出下列名词的复数形式1 pen ( )2 class ( )3 box ( )4 ruler ( )5 teacher ( )6 name ( )7 number ( )8 year ( )9 eraser ( )10 map ( )11 apple ( )12 toy ( )13 desk ( )14 book ( )15 cake ( )16 egg ( )17 bus ( )18 blackboaed ( )

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请写出下列名词的复数形式1 pen ( )2 class ( )3 box ( )4 ruler ( )5 teacher ( )6 name ( )7 number ( )8 year ( )9 eraser ( )10 map ( )11 apple ( )12 toy ( )13 desk ( )14 book ( )15 cake ( )16 egg ( )17 bus ( )18 blackboaed ( )
请写出下列名词的复数形式
1 pen ( )
2 class ( )
3 box ( )
4 ruler ( )
5 teacher ( )
6 name ( )
7 number ( )
8 year ( )
9 eraser ( )
10 map ( )
11 apple ( )
12 toy ( )
13 desk ( )
14 book ( )
15 cake ( )
16 egg ( )
17 bus ( )
18 blackboaed ( )

请写出下列名词的复数形式1 pen ( )2 class ( )3 box ( )4 ruler ( )5 teacher ( )6 name ( )7 number ( )8 year ( )9 eraser ( )10 map ( )11 apple ( )12 toy ( )13 desk ( )14 book ( )15 cake ( )16 egg ( )17 bus ( )18 blackboaed ( )
1 pen ( pens )
2 class ( classes )
3 box ( boxes )
4 ruler ( rulers )
5 teacher ( teachers )
6 name ( names )
7 number ( numbers )
8 year ( years )
9 eraser ( erasers )
10 map ( maps )
11 apple ( apples )
12 toy ( toys )
13 desk ( desks )
14 book ( books )
15 cake ( cakes )
16 egg ( eggs )
17 bus ( buses )
18 blackboaed ( blackboards )
希望回答对你有帮助

pens classes boxes rulers teachers names numbers years erasers maps apples toys desks books cakes eggs buses blackboards

1 pens
2 classes
3 boxes
4 rulers
5 teachers
6 names
7 numbers
8 years
9 erasers
10 maps
11 apples
12 toys
13 desks
14 books
15 cakes
16 eggs
17 buses
18 blackboards（您开始拼写错啦）

直接加s 末尾s，ch,sh加es 末尾y变y为i加es