1. It's the biggest rocket they've ever seen.

   They've never + V3 + such + (a/an) + adj + O + before

   = It's the + most adj/adj-est + they've ever + V3/ed.

2. She hasn't read any greater invention than this for ages. (Xem lại đề câu này)

   It's ages since... = S + have/has + V3/ed + .... + for ages

3. It's pointless to repair that old laptop.

   It is pointless + to-V: vô nghĩa, vô ích, không đáng khi làm gì

4. Bill enjoys studying AI in a well-known university.

   interested in + V-ing = enjoy + V-ing

5. Kristina has worked at NASA for 12 years.

   S + started + to + V + O + time + ago

   = S + has/have + V3/ed + O + for + time

6. I don't really want to download the applications from untrusted sources.

   want + to-V: muốn làm gì

7. It's the first time I have seen ASIMO robot in real life 

   HTHT + before = It's the first time + HTHT
8. How long has the system started to heave abnormally? 

   When did + S + start + to-V = How long + has/have + S + started + to-V

9. It is unnecessary to be present on all social media platforms.  

   not need to V = It's unnecessary to V

10. She fancies buying modern household appliances. 

   fancy + V-ing: thích làm gì