giải cho tôi bài 4 và bài 5

Công thức thì HTTD 

(+) S + am/is/are + Ving 

(-) S + am/is/are + not + Ving 

(?) Am/Is/Are +S +Ving? 

DHNB: now, right now, (!), at present, at the moment,.....

Công thức thì QKĐ (V: thường)

(+) S + V2/ed 

(-) S + didn't + V1 

(?) Did + S+ V1?

DHNB: ago, last (year, month ...), yesterday, in + năm QK, ...

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What: cái gì 

Who: ai 

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EX4: 

1. What happened on the way to school? 

2. What did she buy from the shop? 

3. What is he hiding from you? 

4. What frightened them ? 

5. What are they stealing? 

6. What fell out of the sky? 

EX5: 

1. Who wrotte Hamlet? 

2. What did Shakespeare write? 

3. Who created Mickey Mouse? 

4. What did Walt Disney create? 

5. Who started Facebook?

6. What did Mark Zuckerberg start?