1. We often hide our phones-we don't want him to ruin them or grow too dependent on them but he almost always tracks them down once he hears the ring or the buzz of an incoming message.

本句是一個復合句，主句是由 but引導的并列的句子。破折號后面 we don't...on them是對we often hide our phones的目的的補充說明。其中 or引導兩個并列的動詞短語。once引導時間狀語從句，其中or連接兩個并列的名詞短語。

語法重點：并列結構，時間狀語從句

2. And when we pick up the phone or check messages, that only makes our son want the phone more, since he always wants whatever is in our hands.

本句是一個復合句，主句是 that only makes our son want the phone more. when引導時間狀語從句，since引導原因狀語從句，其中whatever引導的名詞性從句作want的賓語。

語法重點：時間狀語從句，原因狀語從句，名詞性從句

3. The AP recently ran a story on how more parents are downloading kid-friendly apps, such as white noise and rattle sounds and easy video games, to their cellphones.

本句是一個復合句，其中how引導的名詞性從句作on的賓語。such as表示舉例。

語法重點：名詞性從句