Key 13-15

KEY 13:   

“ant” to “ance”  noun

“ent” to “ence” adjective

 List of silent letters

KEY 14:  

Adding suffixes with similar sounds: ary; ery; ory;

Cian, tial, cial ; seed; sede; cede

When to choose correct  ending: “ious” or” eous”

“uous”/ “us”;  able/ible;  tient/cient

When to double the last letter when adding suffixes

Keys 15:

Unstressed syllables

The concept of “schwa” - the stressed syllable

When to double last letter of two beat main words                   

When not to double when adding endings and suffixes