I last saw my best friend six years ago.
=> I haven’t ………………………………………………………….………..………
The lazy boy keeps forgetting his homework.
=> The lazy boy is…………………………………………………………..………..
Nobody rented this expensive hotel a long time ago
=> This expensive………………………..……………………………………
1. I haven’t seen my best friend for 6 years. (S + haven’t/ hasn’t + PII.)
2. The lazy boy is used to forgetting his homework. (keep + V-ing=used to+V-ing)
3. This expensive hotel hasn’t been rented for a long time.
I last saw my best friend six years ago.
=> I haven’t seen my best friend for six years.
The lazy boy keeps forgetting his homework.
=> The lazy boy is always forgetting his homework.
Nobody rented this expensive hotel a long time ago.
=> This expensive hotel wasn’t rented a long time ago.