hartini

1. Could+Verb base

• to offer suggestions or possibilities
• to indicate that the ability existed in the past form but doesn’t exist now
• to express polite requests


2. Would+verb base

• for an action that was repeated regularly in the past
• insert rather into the pattern and use this expression to express preferences
• to express polite request


3. Should+verb base

• to give definition advice (advisability)
• to express the subject’s obligation or duty


4. Might+Verb base

• to tell possibilities
• to express polite request