[Grammar] Comparing between Two Things

Comparing between two different things:
A	is	__________er	than	B
A	is	more __________	than	B
		comparative adjective
C	are	__________er	than	D
C	are	more __________	than	D
		comparative adjective
B	isn’t as	__________	as	A
		adjective

 Tokyo Tower is higher than Eiffel Tower.

Eiffel Tower isn't as high as Tokyo Tower.

Carlos Slim is wealthier than Bill Gates.

Bill Gates isn't as wealthy as Carlos Slim.

A tortoise is faster than a snail.

A snail isn't as fast as a tortoise.

A snail is slower than a tortoise.

A tortoise isn't as slow as a snail.

Comparing between two similar things:
E	is	as	__________	as	F
			adjective
G	are	as	__________	as	H
			adjective

Mark is as tall as Stefan.

The golden shoes are as expensive as the purple shoes.

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[Grammar] Comparative and Superlative Forms of Adjectives

Credit: Teacher Jocelyn

One-syllable adjectives	old wise	COMPARATIVE older wiser	SUPERLATIVE the oldest the wisest	For more one-syllable adjectives, -er and -est are added.
Two-syllable adjectives	famous pleasant	more famous more pleasant	the most famous the most pleasant	For more two-syllable adjectives, more and most are used.
	busy pretty	busier prettier	the busiest the prettiest	-Er and -est are used with two-syllable adjectives that end in -y. The -y is changed to -i.
	clever gentle friendly	cleverer more clever gentler more gentle friendlier more friendly	the cleverest the most clever the gentlest the most gentle the friendliest the most friendly	Some two-syllable adjectives use either -er/-est or more/most: able, angry, clever, common, cruel, friendly, gentle, handsome, narrow, pleasant, polite, quiet, simple, sour.
Adjectives with three or more syllables	important fascinating	more important more fascinating	the most important the most fascinating	More and most are used with long adjectives.
Irregular adjectives	good bad	better worse	the best the worst	Good and bad have irregular comparative and superlative forms.
Both farther and further are used to compare physical distances: I walked farther/further than my friend did. Further (but not farther) can also mean “additional”: I need further information. Source: Fundamental of English Grammar 3rd Edition - Betty Azar.

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