diff --git a/README.md b/README.md
index 5f17add74..a108f2e33 100644
--- a/README.md
+++ b/README.md
@@ -179,7 +179,7 @@ the [td_api.tl](https://github.com/tdlib/td/blob/master/td/generate/scheme/td_ap
 all available `TDLib` [methods](https://core.telegram.org/tdlib/docs/classtd_1_1td__api_1_1_function.html) and [classes](https://core.telegram.org/tdlib/docs/classtd_1_1td__api_1_1_object.html).
 
 `TDLib` JSON interface adheres to semantic versioning and versions with the same major version number are binary and backward compatible, but the underlying `TDLib` API can be different for different minor and even patch versions.
-If you need to support different `TDLib` versions then you can use a value of the `version` option to find exact `TDLib` version and to use appropriate API then.
+If you need to support different `TDLib` versions, then you can use a value of the `version` option to find exact `TDLib` version to use appropriate API methods.
 
 See [example/python/tdjson_example.py](https://github.com/tdlib/td/tree/master/example/python/tdjson_example.py) for an example of such usage.
 
diff --git a/benchmark/bench_misc.cpp b/benchmark/bench_misc.cpp
index 2cc3c9ba5..2c5113dab 100644
--- a/benchmark/bench_misc.cpp
+++ b/benchmark/bench_misc.cpp
@@ -78,7 +78,7 @@ BENCH(NewInt, "new int + delete") {
   do_not_optimize_away(res);
 }
 
-BENCH(NewObj, "new struct then delete") {
+BENCH(NewObj, "new struct, then delete") {
   struct A {
     int32 a = 0;
     int32 b = 0;
@@ -99,7 +99,7 @@ BENCH(NewObj, "new struct then delete") {
 }
 
 #if !TD_THREAD_UNSUPPORTED
-BENCH(ThreadNew, "new struct then delete in several threads") {
+BENCH(ThreadNew, "new struct, then delete in several threads") {
   td::NewObjBench a, b;
   thread ta([&] { a.run(n / 2); });
   thread tb([&] { b.run(n - n / 2); });
diff --git a/td/telegram/MessagesManager.h b/td/telegram/MessagesManager.h
index 51497d2d7..eab5be8a2 100644
--- a/td/telegram/MessagesManager.h
+++ b/td/telegram/MessagesManager.h
@@ -959,7 +959,7 @@ class MessagesManager : public Actor {
     MessageId first_database_message_id;  // identifier of the first message in the database, needed
                                           // until there is no gaps in the database
     MessageId last_database_message_id;   // identifier of the last local or server message, if last_database_message_id
-                                          // is known and last_message_id is known then last_database_message_id <=
+                                          // is known and last_message_id is known, then last_database_message_id <=
                                           // last_message_id
 
     std::array<MessageId, search_messages_filter_size()> first_database_message_id_by_index;
diff --git a/td/telegram/NotificationManager.cpp b/td/telegram/NotificationManager.cpp
index 25ce0870c..19688b31a 100644
--- a/td/telegram/NotificationManager.cpp
+++ b/td/telegram/NotificationManager.cpp
@@ -814,7 +814,7 @@ int32 NotificationManager::get_notification_delay_ms(DialogId dialog_id, const P
   auto delay_ms = [&]() {
     auto online_info = td_->contacts_manager_->get_my_online_status();
     if (!online_info.is_online_local && online_info.is_online_remote) {
-      // If we are offline, but online from some other client then delay notification
+      // If we are offline, but online from some other client, then delay notification
       // for 'notification_cloud_delay' seconds.
       return notification_cloud_delay_ms_;
     }
diff --git a/td/telegram/StickersManager.cpp b/td/telegram/StickersManager.cpp
index 990e6b3e6..4767b7ed5 100644
--- a/td/telegram/StickersManager.cpp
+++ b/td/telegram/StickersManager.cpp
@@ -3095,7 +3095,7 @@ void StickersManager::on_get_archived_sticker_sets(
     LOG(ERROR) << "Receive " << total_count << " as total count of archived sticker sets";
   }
 
-  // if 0 sticker sets are received then set offset_sticker_set_id was found and there is no stickers after it
+  // if 0 sticker sets are received, then set offset_sticker_set_id was found and there is no stickers after it
   // or it wasn't found and there is no archived sets at all
   bool is_last =
       sticker_sets.empty() &&
diff --git a/tdutils/td/utils/ObjectPool.h b/tdutils/td/utils/ObjectPool.h
index 05b223621..97ed0fce7 100644
--- a/tdutils/td/utils/ObjectPool.h
+++ b/tdutils/td/utils/ObjectPool.h
@@ -45,7 +45,7 @@ class ObjectPool {
     // It is not very usual case of acquire/release use.
     // Instead of publishing an object via some flag we do the opposite.
     // We publish new generation via destruction of the data.
-    // In usual case if we see a flag then we are able to use an object.
+    // In usual case if we see a flag, then we are able to use an object.
     // In our case if we have used an object and it is already invalid, then generation will mismatch
     bool is_alive() const {
       if (!storage_) {
diff --git a/tdutils/test/filesystem.cpp b/tdutils/test/filesystem.cpp
index b84e9054f..a482d186f 100644
--- a/tdutils/test/filesystem.cpp
+++ b/tdutils/test/filesystem.cpp
@@ -36,7 +36,7 @@ TEST(Misc, clean_filename) {
   ASSERT_STREQ(clean_filename("....test"), "test");
   ASSERT_STREQ(clean_filename("test.exe...."), "test.exe");  // extension has changed
   ASSERT_STREQ(clean_filename("test.exe01234567890123456789...."),
-               "test.exe01234567890123456789");  // extension may be more then 20 characters
+               "test.exe01234567890123456789");  // extension may be more than 20 characters
   ASSERT_STREQ(clean_filename("....test....asdf"), "test.asdf");
   ASSERT_STREQ(clean_filename("കറുപ്പ്.txt"), "കറപപ.txt");
 }