Brief introducingtion Brief introduction

Since I was twelve years old I have tried to develop my English but I didhave not achieve neitherd a solid intermediate level. Since I was twelve years old I have tried to develop my English but I have not achieved a solid intermediate level.

Perfect tense fits this more here (habitual action), and neither does not fit this context (neither is used to negate two options, neither X or Y)

Since I was twelve years old I've tried to develop my English but I didhave not achieve neitherd a solid intermediate level. Since I was twelve years old I've tried to develop my English but I have not achieved a solid intermediate level.

I mean, I can understand people talking in a slowly pace, or in a monologue or whatever, but do you know when it comethere is some iunexpected word/phrasal verb/idiom (even that ones it isones that are well used) and you have already known about it, but simply don't remember? I mean, I can understand people talking in a slow pace, or in a monologue or whatever, but you know when there is some unexpected word/phrasal verb/idiom (even ones that are well used) and you already know about it, but simply don't remember?

Just simple grammatical errors and some corrections for flow .

I mean, I can understand people talking inat a slowly pace, or in a monologue or whatever, but do you know how when it comes some iunexpected word/phrasal verb/idiom (even thate ones it is well used)that are often used) comes up and you have already known about it, but simply don't remember? I mean, I can understand people talking at a slow pace, or in a monologue or whatever, but you know how when some unexpected word/phrasal verb/idiom (even the ones that are often used) comes up and you already know about it, but simply don't remember?

"You know how when X, and/but Y?" is a common wording when you think that the listener will be able to relate to what you're saying

That always happens with/to me, and it's always frustating. That always happens with/to me, and it's always frustating.

That always happen withs to me, and it's always frustating. That always happens to me, and it's always frustating.

But yeah, I feel more comfort toable speaking and saiying simple things in English ever since I was going outsideent away from my homeland a few months ago, but I really want to improve my English now and ever. But yeah, I feel more comfortable speaking and saying simple things in English ever since I went away from my homeland a few months ago, but I really want to improve my English now.

now and ever - not sure what you are trying to express, but this is not entirely natural / a set phrase in English.

But yeah, I feel more comfort toable speaking and saiying simple things in English since I was gotraveling outside my homeland a few months ago, but I really want to improve my English now and forever. But yeah, I feel more comfortable speaking and saying simple things in English since I was traveling outside my homeland a few months ago, but I really want to improve my English now and forever.

Or "now more than ever"? I wasn't 100% sure what you meant

Thank you for reading this and, who could,ever corrects my text. Thank you for reading this, whoever corrects my text.

Not exactly sure precisely what you meant here, but I simplified it to the closest natural idea I assumed you wished to express!!

Thank you for reading this, and, to who cever would, correct my text. Thank you for reading this, and to whoever would correct my text.