1. Nick is a careful writer than Phuc. (carefully)

⇒ Nick writes essays more carefully than Phuc.

2. A snail is slower than a crab. (slowly)

⇒ A snail moves more slowly than a crab.

3. My father’s explanation about the subject was clearer than my brother’s. (clearly)

My father explained the subject more clearly than my brother.

4. My cousin is a better singer than I am. (well)

My cousin sings better than me.

5. Phong is a faster swimmer than Phuc. (fast)

Phong swims faster than Phuc.

1.Nick is a careful writer than Phuc.(carefully)

→ Nick writes carefully than Phuc.
2. 

A snail is slower than a crab(slowly)

=>A snail moves MORE SLOWLY THAN A CRAB.

3.My father's explanation about the subject was clearer than my brother's(clearly)

=>My father expleined the subject MORE CLEARLY THAN MY BROTHER DOES.

4.My cousin is a better singer than I am(well)

=>My cousin sings BETTER THAN I DO.

5.Phong is a faster swimming than Phuc(fast)

=>Phong swims FASTER THAN PHUC DOES.

1. Nick is a careful writer than Phuc. (carefully)

⇒ Nick writes essays more carefully than Phuc.

2. A snail is slower than a crab. (slowly)

⇒ A snail moves more slowly than a crab.

3. My father’s explanation about the subject was clearer than my brother’s. (clearly)

My father explained the subject more clearly than my brother.

4. My cousin is a better singer than I am. (well)

My cousin sings better than me.

5. Phong is a faster swimmer than Phuc. (fast)

Phong swims faster than Phuc.