diff --git a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
index 9ba0bc9a9..5ab93268b 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
@@ -2621,6 +2621,15 @@ namespace SqlSugar
         {
             return this.Select(expression).MergeTable();
         }
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> LeftJoinIF<T11>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, bool>> joinExpression) 
+        {
+            var result = LeftJoin(joinExpression);
+            if (isLeftJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
         public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> LeftJoin<T11>(ISugarQueryable<T11> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, bool>> joinExpression)
         {
             this.Context.InitMappingInfo<T11>();
diff --git a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider11-12.cs b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider11-12.cs
index 3396b3f1c..27f1c0aed 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider11-12.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider11-12.cs
@@ -19,6 +19,15 @@ namespace SqlSugar
         {
             return this.Select(expression).MergeTable();
         }
+       public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> LeftJoinIF<T12>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, bool>> joinExpression) 
+        {
+            var result = LeftJoin(joinExpression);
+            if (isLeftJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
         public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> LeftJoin<T12>(ISugarQueryable<T12> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, bool>> joinExpression)
         {
             this.Context.InitMappingInfo<T12>();
diff --git a/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs b/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
index 4ecf119bd..2e9604a9c 100644
--- a/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
@@ -1296,6 +1296,7 @@ namespace SqlSugar
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> : ISugarQueryable<T>
     {
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3, T4, T5, T6, T7,T8,T9,T10,TResult>> expression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10,T11> LeftJoinIF<T11>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10,T11, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> LeftJoin<T11>(ISugarQueryable<T11> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> InnerJoin<T11>(ISugarQueryable<T11> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> RightJoin<T11>(ISugarQueryable<T11> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, bool>> joinExpression);
@@ -1425,6 +1426,7 @@ namespace SqlSugar
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> : ISugarQueryable<T>
     {
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10,T11, TResult>> expression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> LeftJoinIF<T12>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, bool>> joinExpression); 
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> LeftJoin<T12>(ISugarQueryable<T12> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> InnerJoin<T12>(ISugarQueryable<T12> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> RightJoin<T12>(ISugarQueryable<T12> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, bool>> joinExpression);