Usage Examples Sequence of tenses

• I think I know the reason. -
• I know that you'll like it -
• I think I understand the system. -
• You know that I will help you. -
• You said you wouldn't tell anybody. -
• I knew she wouldn't open it. -
• I knew you could do it alone. -
• I know we can discover the secret. -
• I thought you were going to wait. -
• I knew you'd want to thank me -
• I think I know this place. -
• He knew she would find it soon. -
• I didn't know he had a sister. -
• I think I'll have a cappuccino. -
• I think I know the answer. -
• He knew we would find this. -
• They knew I could talk with you. -
• I guess I should meet the boy. -
• I think I know that song. -
• I knew we'd be together again. -