Hi Dark Magician (Is your name Mba ?)
Here is what you wrote. [color=blue]And also some answers:
I think you are main help in teach me the language. Thank you very much.
Youâre welcome. 
First I found [color=blue]defalcate when I used one tense in my writing.
[color=blue]Do you mean difficult?
I have a lot of questions, could you explain them to me, please?
1- I understand âcan you - could youâ but when I ask from teacher as you, which I use?
[color=blue]If you have just one or two little questions, âCan youâ is OK. If you want to ask lots and lots of questions, then itâs often much nicer to say âCould youâ.
2- Could you explain difference between âat - inâ?
[color=blue]Dark, there are a lot of different rules for in and at â too many to write here. Did you want to use in or at in specific sentences?
Do you have a grammar book you can use for practice? Most grammar books have exercises for âin, on, + atâ. For example, when you use them to talk about time and also for when you use them to talk about place.
3- I know many verbs we put after it âtoâ such as want and some verbs we didnât put to after it such as can and some verbs we can put or no" to", please tell me about it?
[color=blue]Your question is really much too general to answer here. Itâs best to learn how to use the verbs as you learn and practice them.
After most modal verbs you do not use âtoâ: can, could, will, would, shall, should, must, may, might
But after others you need the word âtoâ: have to, ought to, be able to
Some verbs must be followed by âto + infinitiveâ, some verbs must be followed by just the âinfinitiveâ, some verbs must be followed by the â-ing form of a verbâ, some can be followed by either an âinfinitiveâ or the â-ing formâ with little or no change in meaning, but in some cases the meaning changes.
Unfortunately, there arenât really any âeasy rulesâ.
4- Sometimes I look for one meaning of a word in the dictionary but it doesnât give me right meaning that I want. Such as a great wall, I found rampart!!
[color=blue]Yes, most words have more than one meaning.
Do you have a good âLearners Dictionaryâ â Thatâs a dictionary that tells you the definition and also uses the words in sentences. That can help you decide if you have found the right meaning of a word.
Reading will also help you with vocabulary. Try to do as much reading as possible.
Have you also tried to do some of the tests here on this web site? Start with the elementary tests.
What about doing an English course?
Do you have a grammar book?
In fact I have many questions too.
If you arenât upset by my questions Iâll tell you about them after your solution and your advice.
Yes can you repair my writing too, please?
[color=blue]I made corrections to your writing in boldface type.
I know you have a lot of questions. The problem is: your questions are often so general that they canât be answered in one forum answer. This forum cannot take the place of an English course. But it can help.
Try to focus your questions and your learning more. Thatâs why I asked you to write about your vacation, for example. That was a focus on using the past tense.
Again thank you very much.
Youâre welcome.
Amy
