1. I am happy I don't sad

2. The bus is fast. It isn't slow.

3. My friend is buying a new car. Her old car broke down.

4. I am at the beach with my family. It is hot and sunny out sido. The ocean water is warm.

5. Tom and Jacob are very smart. Tom is a scientist and Jacob is an engineer.

6. The library is . Open until 9:00 p.m.

7. The school is . small. It isn't big.

8. The books are new. They aren't old.

9. Tommy, Steven, and Teddy are . acting in the school play.

10. Judith isn't at home. She is at school.

Công thức

• I + am + Ving
• He/ She/ It/ Danh từ số ít/ Danh từ không đếm được + is + Ving
• You/ We/ They/ Danh từ số nhiều + are + Ving

CHÚC BẠN HỌC TỐT!!! CHO MIK CTLHN!!

Công thức tobe HTĐ :

`( + )` $\begin{cases} I + am\\He/she/it + is\\You/We/They + are \end{cases}$

`( - )` $\begin{cases} I + am not \\He/she/it + isn't\\You/We/They + aren't \end{cases}$

Đáp án :

`1)` am ; am not

`2)` is ; isn't

`3)` is

`4)` am

`5)` are ; is ; is

`6)` is

`7)` is ; isn't

`8)` are ; aren't

`9)` are

`10)` isn't ; is