Sử dụng thì present perfect tense:
People have developed many different paper products
→ Many different paper products…….
Sử dụng thì present perfect tense:
People have developed many different paper products
→ Many different paper products…….
People have developed many different paper products.
⇒ Many different paper products have been developed (by people).
– Cấu trúc bị động hiện tại hoàn thành: S + have/has + been + Vpp + place + by SO + time.
– “people” trong câu này có thể lược bỏ.
→ Many different paper products have been developed
Giải thích : Câu bị động thì hiên tại hoàn thành :
→ S + have/has been + P.P + (by O ) + ….