diff --git a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs
index 928566797..9962c162c 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs
@@ -1290,6 +1290,15 @@ namespace SqlSugar
         {
             return this.Select(expression).MergeTable();
         }
+        public ISugarQueryable<T, T2, T3, T4, T5> LeftJoinIF<T5>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, 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> LeftJoin<T5>(ISugarQueryable<T5> joinQueryable, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression)
         {
             this.Context.InitMappingInfo<T5>();
@@ -1984,6 +1993,17 @@ namespace SqlSugar
         {
             return this.Select(expression).MergeTable();
         }
+        
+        public ISugarQueryable<T, T2, T3, T4, T5, T6> LeftJoinIF<T6>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, 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> LeftJoin<T6>(ISugarQueryable<T6> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, bool>> joinExpression)
         {
             this.Context.InitMappingInfo<T6>();
diff --git a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
index 584211020..e1a5a6574 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs
@@ -19,6 +19,15 @@ namespace SqlSugar
         {
             return this.Select(expression).MergeTable();
         }
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7> LeftJoinIF<T7>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, 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> LeftJoin<T7>(ISugarQueryable<T7> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, bool>> joinExpression)
         {
             this.Context.InitMappingInfo<T7>();
@@ -693,6 +702,15 @@ namespace SqlSugar
         public virtual ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3, T4, T5, T6,T7, TResult>> expression)
         {
             return this.Select(expression).MergeTable();
+        }
+         public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> LeftJoinIF<T8>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, 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> LeftJoin<T8>(ISugarQueryable<T8> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, bool>> joinExpression)
         {
diff --git a/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs b/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
index 67f4a7c96..428f10544 100644
--- a/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
@@ -507,6 +507,7 @@ namespace SqlSugar
     public partial interface ISugarQueryable<T, T2, T3, T4> : ISugarQueryable<T>
     {
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3,T4, TResult>> expression);
+        ISugarQueryable<T, T2, T3, T4,T5> LeftJoinIF<T5>(bool isLeftJoin, Expression<Func<T, T2, T3, T4,T5, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5> LeftJoin<T5>(ISugarQueryable<T5> joinQueryable, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5> InnerJoin<T5>(ISugarQueryable<T5> joinQueryable, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5> RightJoin<T5>(ISugarQueryable<T5> joinQueryable, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression);
@@ -644,6 +645,7 @@ namespace SqlSugar
     public partial interface ISugarQueryable<T, T2, T3, T4, T5> : ISugarQueryable<T>
     {
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3,T4,T5, TResult>> expression);
+        ISugarQueryable<T, T2, T3, T4, T5,T6> LeftJoinIF<T6>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5,T6, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6> LeftJoin<T6>(ISugarQueryable<T6> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6> InnerJoin<T6>(ISugarQueryable<T6> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6> RightJoin<T6>(ISugarQueryable<T6> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, bool>> joinExpression);
@@ -773,6 +775,7 @@ namespace SqlSugar
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6> : ISugarQueryable<T>
     {
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3, T4, T5,T6, TResult>> expression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6,T7> LeftJoinIF<T7>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6,T7, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7> LeftJoin<T7>(ISugarQueryable<T7> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7> InnerJoin<T7>(ISugarQueryable<T7> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7> RightJoin<T7>(ISugarQueryable<T7> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, bool>> joinExpression);
@@ -911,6 +914,7 @@ namespace SqlSugar
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7> : ISugarQueryable<T>
     {
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3, T4, T5, T6,T7, TResult>> expression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7,T8> LeftJoinIF<T8>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6, T7,T8, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> LeftJoin<T8>(ISugarQueryable<T8> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> InnerJoin<T8>(ISugarQueryable<T8> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, bool>> joinExpression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> RightJoin<T8>(ISugarQueryable<T8> joinQueryable, Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, bool>> joinExpression);