1артикль 1) sky is blue. 2) we see three boys. boys are playing. 3) i have got sister. my sister is engineer. 2 местоимения 1) i don't like tomatoes, i never 2) i can't find my hat. where 3)helen is my best friend. we often go out 4) she sometimes when she cooks. 5) don't read this letter. it's not for 5 множественное число существительных 1) the story is very boring. 2) we can see a cow, a horse, a goose, a sheep and an ox. 3) put the book on the shelf. 4) is it a mouse? 5) her child studies at school.

1) The sky is blue. 2) We see three boys. The boys are playing. 3) I have got a sister. My sister is an engineer.
 2 Местоимения 1) I don't like tomatoes, I never eat them 2) I can't find my hat. Where is it? 3) Helen is my best friend. We often go out with her 4) She sometimes hurts herself when she cooks. 5) Don't read this letter. It's not for you  
5 Множественное число существительных 1) The stories are very boring. 2) We can see cows, horses, geese, sheep and oxen. 3) Put the books on the shelves. 4) Are they mice? 5) Her children study at school.