change the verbs in the brackets into correct present continuous tense!

Struktur dari Present Continuous 
Positive: 
I + am + V-ing 
She/He/It + is + V-ing 
You/They/We + are + V-ing 

Negative: 
I + am + not + V-ing 
She/He/It + is + not + V-ing 
You/They/We + are + not + V-ing 

Interogative: 
Am + I + V-ing ? 
Is+ She/He/It+ V-ing ? 
Are+ You/They/We + V-ing? 

1. It is raining
2. He is studying at the library 
3. Are you exercising  at the fitness center? 
4. We are waiting for you
5. A car alarm is ringing somewhere down the street. It is driving me crazy. - I wish it would stop! It is ringing for more than twenty minutes. 

semoga dapat membantu ya. maaf jika salah