| Expression | Definition | Example |
| sibling | brother or sister | I have three siblings. |
| older / younger | senior or junior in age | I have one older brother, but I don’t have any sisters. |
| a family of (number) | a way to say how many members in a family | We’re a family of four: mom, dad, my older sister, and myself. |
| only child | a child without a brother or sister | Many of my friends have siblings, but I am an only child.
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| be part of ~ | is a member of … | I am part of the language exchange group. |
| take care of… | to do the things that are needed to help or protect (someone) or to keep (something) in good condition | My mom takes care of my grandparents. |
| grow up | to become an adult | Children grow up so quickly. |
| (do) for a living | your work | John paints houses for a living. |
| work as… | have an occupation as … | My friend works as an accountant. |
| (someone) must be… | something is likely | Your parents must be very happy to have such a sweet daughter. |