This is the cleanest and most beautiful beach I have ever seen.

=> I haven’t seen the beach cleaner and more beautiful than this beach before

This is the cleanest and most beautiful beach I have ever seen.

=> I do not see any beautiful beach this.

học tốt!!!

He hasn't seen this interesting film before.

=> He hasn't seen a more interesting film than this film before.

I have never known this expensive car before.

I have never known the car more expensive than this car before

học tốt

Peter began to collect stamps 2 years ago

Peter began collecting stamps two years ago.

I've learned English for eight years. 

I started learning English since I was eight years old.

=> I’ve leant english since i was eight years old

chúc hok tốt

I haven't eaten this kind of food before.

=> This is 2 years since I ate this kind of food.

This is the frist time I have eaten this kind of food

He hasn't gone abroad before.

He hasn`t gone abroad

I haven't drunk this kind of beer before.

=> This is the first time i drank this kink of beer

chúc bn hok tốt

This is the frist time I have drunk this kind of beer

1, We spend forty minutes flying from Vinh to Ha Noi.

3, She spent 2 hours explaning the lesson.

4, I haven't eaten this food before. 

4/ I haven`t eaten this food

I haven't gone to Da Lat before.