How does thinkphp write traditional SQL statements in the Model?

How does thinkphp write traditional SQL statements in the Model? For example, I want to write $ insertsql & nbsp ;=& nbsp; "INSERT & nbsp; INTO & nbsp; wordtest (english, chinese, addedtime, user_id, phptime) & how does nb thinkphp write traditional SQL statements in the Model?
For example, if you want to write
$ Insertsql = "insert into wordtest (english, chinese, addedtime, user_id, phptime) VALUES ('". $ singleword. "','". $ collectchinese. "', NOW (),'". $ userid. "','". $ phptime. "')"; // = the user ID found, added to the user_id field in the word table;
$ Sqlobj-> query ($ insertsql );
I don't want to use the D (); or M () method to directly write a class in the Model.
Can I perform this operation? How do I perform this operation?
------ Solution --------------------
The use of the framework also requires a certain price.

Although the ORM mode in the current framework is very inefficient, it does not mean that it will not become a real ORM in the future.
Of course, the ORM in the current framework is executed after it is assembled into an SQL string.

Therefore, the framework also provides the ActiveRecord mode for you to directly use the SQL command string
$ Model = new Model () // instantiate a model object without any data tables
$ Model-> query ("select * from think_user where status = 1 ");