[1]before引导时间状语从句；what引导宾语从句。
[2]he used为定语从句，修饰名词signs，从句省略了关系代词that或which。
[3]that引导定语从句，修饰名词emojis。
This was my attempt to follow the trend⑤ of communicating with emojis.Emojis are used everywhere, from text messages to emails, blogs and other social media networks.With the rapid development of social media, emojis are becoming an integral⑥ component⑦ of the language [4]we use to express ourselves.
[4]本句为定语从句，修饰the language，从句省略关系代词that或which。
