Comparative adjectives are adjectives that compare differences between the attributes of two nouns. These are often measurements, such as height, weight, depth, distance, etc., but they don’t have to be. We can also use comparative adjectives to compare non-physical characteristics. As we can see above, we form comparative adjectives either by adding “-er” to the end of the adjective, or by adding the word more (or less) before the adjective. So how do we know which to choose? Although there are some exceptions, you can follow some simple general rules for forming comparative adjectives: When we discuss comparative adjectives, we class them into two types: short and long. “Short” adjectives are adjectives that have only one syllable, or else have two syllables and end in “-y.” For the majority of short adjectives, we form the comparative according to the following rules:
Aside from the major rules in the table, there are two other things we must keep in mind about short adjectives. First, if the adjective ends in “-e,” we just add “-r,” not “-er.” This is to avoid doubling the letter “e.” For example:
Second, if the last three letters of the adjective are in the pattern consonant, vowel, consonant, we double the final consonant before adding “-er” to the word. For example:
“Long” adjectives are adjectives that have three or more syllables, or adjectives that have two syllables and do not end in “-y.” For these adjectives, we can follow these rules:
As with most grammatical “rules” in English, there are some exceptions to the patterns above. Here are a few of the adjectives that have irregular comparative forms: There are also some adjectives that have two generally accepted comparative forms. These are some of the most common: *When referring to distance, farther and further can be used interchangeably. However, in American English, farther is preferred when comparing physical distances and further when comparing figurative distances. For example:
In British English, further is more common both for physical and figurative distances. Now that we have discussed how to form comparative adjectives, we can look at how they are used in sentences and within larger conversations. Depending on the situation, you may or may not need to explicitly mention both nouns being compared. Often, the two nouns that are being compared both appear in the sentence. This is the case if there is any chance of the listener or reader being confused by what you’re talking about. When we need to mention both nouns, we follow this structure:
In each of these sentences, the noun that has the characteristic to a greater degree comes first. We can achieve the same meaning by using opposite adjectives and switching the order that the nouns appear in. For example:
If we want to achieve the same effect using “long” adjectives, instead of inserting the word more before the adjective, we can insert the word less. For example:
Keep in mind that the two nouns being compared don’t necessarily have to be individual people or objects. One or both of the nouns or noun phrases being compared can also refer to groups. For example:
We can even compare two gerunds (verbs ending in “-ing” that function as nouns). We can compare characteristics of two gerunds in the same way that we can compare any other type of noun:
Finally, we can use the regular patterns for making negative and interrogative sentences. For negatives, we simply add the word not, or its contracted form, “-n’t,” after the verb be:
To form interrogatives (questions), we simply place the conjugated form of the verb be at the beginning of the sentence:
If we are not sure which noun is taller, faster, etc., we can ask by adding a question word like who, which, or what to the beginning of the sentence, and placing the two nouns as options at the end:
Sometimes in conversation, it isn’t necessary to explicitly mention one or both nouns that we’re comparing. In fact, it might even sound repetitive. Take for example the following conversation:
That’s a very repetitive conversation and probably wouldn’t occur in natural speech. Instead, the two speakers can omit the parts underlined, which avoids repetition and creates a more natural-sounding conversation:
Note that when we omit a noun, we also omit the word than. We can only use gradable adjectives as comparative adjectives. Gradable adjectives are adjectives that can move up and down on a scale of intensity. For example, tall is a gradable adjective because something can be a little tall, tall, or very tall. We can also use expressions like a bit, a little, much, a lot, and far before the comparative adjective to indicate scale. For example:
Ungradable adjectives are adjectives that can’t move up and down on a scale of intensity. For example, you cannot say “I am very married.” You are either married, or you aren’t. The same can be said for the adjective dead: something is either dead or it isn’t. These types of adjectives cannot be used in the comparative form. There is another way to express similarities and differences between two nouns using adjectives that aren’t comparative. To describe two things as equal, we can use the construction as + adjective + as. For example:
We can use the same construction to say that two things are unequal. We just have to add the word not:
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