Need of work urgent

To find a job, it is important to mention your education and past work experience.
You should also clarifyl your visa status - i.e. whether you are legally allowed to work.

I have completed high school and i.t training.

Without recognized university degree, it is very difficult to find a job in Singapore as a foreigner. But you can try applying at suitable companies in your industry nevertheless. Good luck!
You haven't replied about you visa status.

I am now about to come to Singapore

That doesn't answer any questions. 

I'd recommend you continue your education first, otherwise you're going to have a very difficult time as Beppi mentions.

Romaniac

Thank you very much

Apart from education, the most important thing is your visa status.

If you r holding a travel visa, chances to get a job is near to 0.

If you r holding dependant pass, then provide your education details or search jobs according to your qualification n exp in various local job portals, you may be hired.

If you r a PR then should not have much problem I believe.

Good luck.

I want a clerical Job in Singapore, having experience of more then 11 yrs and m a graduate.  But after sending CV to concerned companies, I am not receiving any reply. Why so?