3, Charles has a good relationship with his classmates
→ Tobe reconciled with sb = to have a good relationship with sb: có quan hệ tốt với ai
4, It's too stressful to do too many tasks at the same time
→ Tobe too + adj (for sb) + to-inf: quá ... để ...
5, We don't have permission to go camping in the mountains
→ To have permission to-inf: có phép để làm gì
