+ing
+ed
+est
100

Add ing to swim

swimming

100

Add ed to rob

robbed

100

Add est to big

biggest

200

Add ing to fit.

Fitting

200

Add ed to pop

popped

200

Add est to bright

brightest

300

Add ing to rain

raining

300

Is claped correct or incorrect? 

Incorrect - clapped

300

Fittest or fitest?

fittest

400

Add ing to fix.

Fixing. English spelling usually does not double the letters w, x, or y at the end of words.

400

Fix the error: The wolf huntted the sheep.

hunted

400

Do we add another l to small + est?

No. We don't increase double letters. 'smallest' is correct.

500
Why is the rabbit 'hopping' and not 'hoping' along the path? What is the rule?

The o in 'hop' is a short vowel sound so we double the consonant to 'hopping'.

500
Add ed to box

boxed - English spelling usually does not double the letters w, x, or y at the end of words.

500

Is it correct? 'Sadest'.

No. Saddest has a double d.

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