diff --git a/doc/src/sgml/brin.sgml b/doc/src/sgml/brin.sgml
index 4ee8908b65a..71697155d7c 100644
--- a/doc/src/sgml/brin.sgml
+++ b/doc/src/sgml/brin.sgml
@@ -75,7 +75,7 @@
    summarized will cause the summary information to be updated with data
    from the new tuples.
    When a new page is created that does not fall within the last
-   summarized range, the range that the new page belongs into
+   summarized range, the range that the new page belongs to
    does not automatically acquire a summary tuple;
    those tuples remain unsummarized until a summarization run is
    invoked later, creating the initial summary for that range.
diff --git a/doc/src/sgml/ref/drop_extension.sgml b/doc/src/sgml/ref/drop_extension.sgml
index 4ea20131c79..dcc52c2ced0 100644
--- a/doc/src/sgml/ref/drop_extension.sgml
+++ b/doc/src/sgml/ref/drop_extension.sgml
@@ -81,8 +81,8 @@ DROP EXTENSION [ IF EXISTS ] <replaceable class="parameter">name</replaceable> [
     <listitem>
      <para>
       This option prevents the specified extensions from being dropped
-      if there exists non-extension-member objects that depends on any
-      the extensions.  This is the default.
+      if there exist non-extension-member objects that depend on any
+      of the extensions.  This is the default.
      </para>
     </listitem>
    </varlistentry>
diff --git a/doc/src/sgml/ref/psql-ref.sgml b/doc/src/sgml/ref/psql-ref.sgml
index a95ddd60ee2..7ba6e4efcb9 100644
--- a/doc/src/sgml/ref/psql-ref.sgml
+++ b/doc/src/sgml/ref/psql-ref.sgml
@@ -2864,7 +2864,7 @@ lo_import 152801
           </para>
 
           <para>
-           <literal>page</literal>: truncate the the header line at the terminal
+           <literal>page</literal>: truncate the header line at the terminal
            width.
           </para>