$\text{1. They have visited the Sillicon Valley last November.}$

⇒ They (Vì they là danh từ số nhiều) + have + V3 của visit + Vế 2

$\text{2. Nam has been happy when he had a computer.}$

⇒ Nam (Vì Nam là danh từ số ít) + has + V3 của be + Vế 2

$\text{3. We have learned/learnt Computer Science for a month.}$

-> learn có hai cách chia present perfect một là learned và learnt.

⇒ We (DTSN) + have + V3 learn + Vế 2.

$\text{4. Has she worked at our school in 2000?}$

⇒ Has + She (DTSI) + V3 work + Vế 2.

$\text{5. I have used those programs about two years.}$

⇒ I (danh từ số ít nhưng bất quy tắc) + have + V3 use + Vế 2.

$\text{6. The printer has stopped working in this morning.}$

⇒ The printer (DTSI) + has + V3 của stop + Vế 2

$\text{7. Have they known each other since (từ khi) they learned at primary school?}$

⇒ Have + they (DTSN) + V3 của know + vế 2

$\text{8. He has read the book by Mark Twain about two days.}$

⇒ He (DTSI) + has + V3 của read + Vế 2

$\text{9. Have you ever (đã từng) been to HaLong Bay?}$ $\text{ → Yes, I have been there twice.}$

⇒ Have + you (DTSI) + V3 be + Vế 2  → Câu trả lời (Yes/No) + I (DTSI bất quy tắc) + V3 be + Vế 2

$\text{10. It has rained heavily about two hours.}$

⇒ It <là bầu trời> (DTSI) + has + V3 của rain + Vế 2

⇔ Kiến thức của tớ nên có gì sai thành thật xin lỗi ạ ⇔

$Học tốt$

$#Pẻo$

1. They have visited the Silicon Valley since last November.

2. Nam has been happy since he had the computer.

3. We have learnt Computer Science for a month.

4. Has she worked at our school since 2000 ?

5. I have used those programs for two years.

6. The printer has stopped working since this morning.

7. Have they known each other since they learned at primary school ?

8. He has read the book by Mark Twain for two days.

9. Have you ever been to Ha Long Bay ? Yes, I have been there twice.

10. It has rained heavily for two hours.