you think it is easy for you but you fail to do it.
I let my guard down.
Synonyms of let my guard down
don't pay attention to
Definition of pay attention to is as follows:
to watch or listen to someone or something carefully.
If you say "don't pay attention to", you don't focus on something crefully.
I'm sorry, I wasn't paying attention to what you were saying.
my mind was elsewhere
You think about other things or think about nothing when someone talks to you.
My mind was elsewhere.
Android App: English Buddy
One of important factors to learn English is to speak English. The app helps you speak and listen to English. In addition, you can create your own word list and test them. Here is the link to see more detail on Google Play.
● YURAGI(iPhone) ● YURAGI(Android) - You can listen to nature sounds such as rain, river, fire during your work, study or free moment between things. - YURAGI is subscription app including one week free trial but you can listen to four nature sounds for free. - Sample movie of YURAGI
● HONEYEATS(iPhone) - SImple food diary app - You can understand your eating habit, meal time and the app calculates total calories of the day for you.