Theory:

Sometimes, new words are formed by adding "ly" at the end of words. The words newly formed either have a changed meaning or a new meaning. Words that are added at the end of words are called suffixes.
Example:
1. lone \(+\) ly \(=\) lonely
2. beautiful \(+\) ly \(=\) beautifully
3. brave \(+\) ly \(=\) bravely
4. broad \(+\) ly \(=\) broadly
5. complete \(+\) ly \(=\) completely
Important!
Note that it is not possible to add suffixes to all words.

It is good to know that the words usually combined are adjectives. Adjectives are words that describe the quality/quantity/feature of a noun in a sentence. After adding "ly" such words become Adverbs. Adverbs are words that modify an adjective.

Adjectives \(+\) "ly" \(=\) Adverbs.

Some words from the lesson where "ly" is added to form a new word:

No.
Word
 + ly
New word
1
Slow + lySlowly
2
Probable + lyProbably
3
Lone + lyLonely
4
One + lyOnly
5
Complete + lyCompletely
6
Unlike + lyUnlikely
7
Cross + lyCrossly
8
Immediate + lyImmediately
9
Simple + lySimply
10
Soft + lySoftly
11
Vigorous + lyVigorously
12
Live + lyLively

Words where "ly" cannot be added to make new words:

  1. Blossom
  2. Fertile
  3. Rocky
  4. Still
  5. Far
  6. Small
  7. Old
  8. Warmth
  9. Tall