Today, I'm very lazy Today, I'm very lazy

"I've been very lazy" or "I feel very lazy" are probably more typical native constructions

Today, I'm vVery lLazy Today I'm Very Lazy Today

Usually, I work all day, from 8 am to 6 pm, but the; however, today work was so boring because the apps are finished and the tester was testing the appbeing tested. Usually, I work all day, from 8 am to 6 pm; however, today work was so boring because the apps are finished being tested.

Then, I saw some corrections but I think it isthey are not true because I can not see these errors. Then, I saw some corrections but I think they are not true because I cannot see the errors.

"These errors" should refer back to previously mentioned errors. It's the first time you're mentioning it, so "the errors" is correct.

Then,I thought I saw some corrections, but I think it is not truedon't think so now because I canould not see these errors. I thought I saw some corrections, but I don't think so now because I could not see the errors.

I told my leader and she said: Ok, tell her that she could provetest the app on different mobiles phones because she would not provetest it in only one. I told my leader and she said: Ok, tell her that she could test the app on different mobile phones because she would not test it in only one.

I'm not sure what word you're looking for, either test or approve, but definitely not prove. Even fixing that word, I don't know exactly what's going on here.

I told my leader about them and she said: , "Ok, tell her [that she could provee tester] to check the app on different mobiles phone because she would not prove it in onlyphones and not just check it on one". I told my leader about them and she said, "Ok, tell her [the tester] to check the app on different phones and not just check it on one".

Around 4 pm, the tester told me that she could provecheck the app tomorrow because she has no other mobile phone. Around 4 pm, the tester told me that she could check the app tomorrow because she has no other mobile phone.

another possibility

Around 4 pm, the tester told me that she could provecheck the app tomorrow because she has no other mobile phonedidn't have another phone with her. Around 4 pm, the tester told me that she could check the app tomorrow because she didn't have another phone with her.

Then, I doid not do anything in my work, I want to takeget in my bed and watch videos or chat. Then, I did not do anything in my work, I want to get in my bed and watch videos or chat.

or maybe you mean "I will not"

ThenAfter, I do noidn't do anything in of my work,. I wanted to take ingo to my bed and watch videos or chat with people. After, I didn't do any of my work. I wanted to go to my bed and watch videos or chat with people.

Although, I study nothing! Although, I study nothing!

This us of "although" is a little strange; probably you meant "even so" or "and yet"

Although, I study noHowever, I didn't end up studying anything! However, I didn't end up studying anything!

and I feel really bad because I try to practice every day my English every day but today I amhave been very lazy. and I feel really bad because I try to practice my English every day but today I have been very lazy.

best if the direct object comes right after the verb in this sentence

aAnd I feel really bad because I try to practice every day my English every day, but today I am feeling very lazy. And I feel really bad because I try to practice my English every day, but today I am feeling very lazy.

Now, I've practiced writing this text in 7 minutes and the time is over! Now, I've practiced writing this text in 7 minutes and the time is over!

Now, I am practiceing writing by writing this text infor 7 minutes and the time is now over! Now, I am practicing writing by writing this text for 7 minutes and the time is now over!