Here are the completed sentences:
- Our classmates are singing a song.
- We are skiing.
- I am dancing.
- They are making us smile.
- Tom is having breakfast.
- Kate is dreaming.
- I am taking photo.
- We are smiling.
- They are speaking English.
Explanation:
The present continuous tense is formed using the verb 'to be' (am, is, are) + the present participle (verb + -ing).
- 'Am' is used with 'I'.
- 'Is' is used with singular subjects (Tom, Kate).
- 'Are' is used with plural subjects (Our classmates, We, They).