diff --git a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
index e1a5a6574..9ba0bc9a9 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
@@ -1349,6 +1349,15 @@ namespace SqlSugar
         {
             return this.Select(expression).MergeTable();
         }
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> LeftJoinIF<T9>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, 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> LeftJoin<T9>(ISugarQueryable<T9> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, bool>> joinExpression)
         {
             this.Context.InitMappingInfo<T9>();
@@ -1978,6 +1987,15 @@ namespace SqlSugar
         {
             return this.Select(expression).MergeTable();
         }
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> LeftJoinIF<T10>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, 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> LeftJoin<T10>(ISugarQueryable<T10> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, bool>> joinExpression)
         {
             this.Context.InitMappingInfo<T10>();
diff --git a/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs b/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
index 428f10544..4ecf119bd 100644
--- a/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
@@ -1040,6 +1040,7 @@ namespace SqlSugar
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> : ISugarQueryable<T>
     {
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3, T4, T5, T6, T7,T8, TResult>> expression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8,T9> LeftJoinIF<T9>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8,T9, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> LeftJoin<T9>(ISugarQueryable<T9> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> InnerJoin<T9>(ISugarQueryable<T9> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> RightJoin<T9>(ISugarQueryable<T9> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, bool>> joinExpression);
@@ -1173,6 +1174,7 @@ namespace SqlSugar
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> : ISugarQueryable<T>
     {
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8,T9,TResult>> expression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9,T10> LeftJoinIF<T10>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9,T10, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> LeftJoin<T10>(ISugarQueryable<T10> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> InnerJoin<T10>(ISugarQueryable<T10> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> RightJoin<T10>(ISugarQueryable<T10> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, bool>> joinExpression);