there is a tomato here改為複數句

there is a tomato here改為複數句

there are tomatoes here

句子開頭是there is怎麼改為複數形式？
句子開頭是there is怎麼將其改為複數形式？下麵有一些題目，麻煩厲害的朋友幫我的忙
例：There is a pencie on the desk
There are some pencies on the desk
1.There is a watch on the table.
2.There is a knife near that tin.
3.There is a policiman in the kitchen.
4.There is a cup on the table.
5.There is a letter on shelf.
6.There is a peach on the desk.
7.There is a passport on the shelf.
8.There is a fish in the cupboard.
9.There is a tree in the garden.
10.There is a boat on the river
如果回答者能告訴我為什麼要這樣改那就更好了，簡短一點就好！

1.There are some watches on the table.
2.There are some knives near that tin.
3.There are some policimen in the kitchen.
4.There are some cups on the table.
5.There some letters on shelf.
6.There some peaches on the desk.
7.There are some passports on the shelf.
8.There are some fish in the cupboard.
9.There are some trees in the garden.
10.There are some boats on the river

here is a photo of my family改為複數形式
here [ ] [ ]of my family

here are（some）photoes of my family