diff --git a/src/compile.c b/src/compile.c
index fe3bf47..63c6290 100644
--- a/src/compile.c
+++ b/src/compile.c
@@ -247,6 +247,52 @@ char* compile_expression(tSyntaxElement* syntaxelement) {
 
 								string_append(&result,"}");
 
+							} else if (strcmp(token->content.string, "isnull") == 0) {
+
+								string_append_free(&result, compile_expression_wrapped(token->next));
+								string_append(&result, " is null");
+
+							} else if (strcmp(token->content.string, "notnull") == 0) {
+
+								string_append_free(&result, compile_expression_wrapped(token->next));
+								string_append(&result, " is not null");
+
+							} else if (strcmp(token->content.string, "same") == 0) {
+
+								string_append_free(&result, compile_expression_wrapped(token->next));
+								string_append(&result, " is same as ");
+								string_append_free(&result, compile_expression_wrapped(token->next->next));
+
+							} else if (strcmp(token->content.string, "diff") == 0) {
+
+								string_append_free(&result, compile_expression_wrapped(token->next));
+								string_append(&result, " is not same as ");
+								string_append_free(&result, compile_expression_wrapped(token->next->next));
+
+							} else if (strcmp(token->content.string, "isdiv") == 0) {
+
+								string_append_free(&result, compile_expression_wrapped(token->next));
+								string_append(&result, " is divisible by ");
+								string_append_free(&result, compile_expression_wrapped(token->next->next));
+
+							} else if (strcmp(token->content.string, "notdiv") == 0) {
+
+								string_append_free(&result, compile_expression_wrapped(token->next));
+								string_append(&result, " is divisible by ");
+								string_append_free(&result, compile_expression_wrapped(token->next->next));
+
+							} else if (strcmp(token->content.string, "is") == 0) {
+
+								string_append_free(&result, compile_expression_wrapped(token->next));
+								string_append(&result, " is ");
+								string_append_free(&result, compile_expression(token->next->next));
+
+							} else if (strcmp(token->content.string, "not") == 0) {
+
+								string_append_free(&result, compile_expression_wrapped(token->next));
+								string_append(&result, " is not ");
+								string_append_free(&result, compile_expression(token->next->next));
+
 							} else {
 
 								string_append(&result,token->content.string);