revise grammar (#197)
diff --git a/1.3/user_manual/Writing_Accumulo_Clients.md b/1.3/user_manual/Writing_Accumulo_Clients.md
index a31f91c..916a071 100644
--- a/1.3/user_manual/Writing_Accumulo_Clients.md
+++ b/1.3/user_manual/Writing_Accumulo_Clients.md
@@ -25,7 +25,7 @@
## <a id="Writing_Data"></a> Writing Data
-Data are written to Accumulo by creating Mutation objects that represent all the changes to the columns of a single row. The changes are made atomically in the TabletServer. Clients then add Mutations to a BatchWriter which submits them to the appropriate TabletServers.
+Data is written to Accumulo by creating Mutation objects that represent all the changes to the columns of a single row. The changes are made atomically in the TabletServer. Clients then add Mutations to a BatchWriter which submits them to the appropriate TabletServers.
Mutations can be created thus:
diff --git a/1.4/user_manual/Writing_Accumulo_Clients.md b/1.4/user_manual/Writing_Accumulo_Clients.md
index f8dd316..21eae70 100644
--- a/1.4/user_manual/Writing_Accumulo_Clients.md
+++ b/1.4/user_manual/Writing_Accumulo_Clients.md
@@ -48,7 +48,7 @@
## <a id="Writing_Data"></a> Writing Data
-Data are written to Accumulo by creating Mutation objects that represent all the changes to the columns of a single row. The changes are made atomically in the TabletServer. Clients then add Mutations to a BatchWriter which submits them to the appropriate TabletServers.
+Data is written to Accumulo by creating Mutation objects that represent all the changes to the columns of a single row. The changes are made atomically in the TabletServer. Clients then add Mutations to a BatchWriter which submits them to the appropriate TabletServers.
Mutations can be created thus:
diff --git a/1.5/accumulo_user_manual.html b/1.5/accumulo_user_manual.html
index 0916317..14941ef 100644
--- a/1.5/accumulo_user_manual.html
+++ b/1.5/accumulo_user_manual.html
@@ -1246,7 +1246,7 @@
</div>
<div class="sect2">
<h3 id="_writing_data">4.3. Writing Data</h3>
-<div class="paragraph"><p>Data are written to Accumulo by creating Mutation objects that represent all the
+<div class="paragraph"><p>Data is written to Accumulo by creating Mutation objects that represent all the
changes to the columns of a single row. The changes are made atomically in the
TabletServer. Clients then add Mutations to a BatchWriter which submits them to
the appropriate TabletServers.</p></div>
