diff --git a/.emacs b/.emacs
index 06da87b..5616c8f 100644
--- a/.emacs
+++ b/.emacs
@@ -203,6 +203,8 @@
 (is-installed 'avy)
 (avy-setup-default)
 (global-set-key (kbd "M-g f") 'avy-goto-line)
+(global-set-key (kbd "M-g w") 'avy-goto-word-1)
+
 ;; 2.8 multiple-cursors
 (is-installed 'multiple-cursors)
 (require 'multiple-cursors)
@@ -211,7 +213,45 @@
 (global-set-key (kbd "C-<") 'mc/mark-previous-like-this)
 (global-set-key (kbd "C-c C-<") 'mc/mark-all-like-this)
 ;;---------
-
+;;3 language tools
+;;---------------
+;; (is-installed 'langtool)
+;; (setq langtool-http-server-host "localhost"
+;;       langtool-http-server-port 8010)
+;; (setq langtool-java-user-arguments '("-Dfile.encoding=UTF-8"))
+;; (setq langtool-default-language "en-US")
+;; (global-set-key "\C-x4w" 'langtool-check)
+;; (global-set-key "\C-x4W" 'langtool-check-done)
+;; (global-set-key "\C-x4l" 'langtool-switch-default-language)
+;; (global-set-key "\C-x44" 'langtool-show-message-at-point)
+;; (global-set-key "\C-x4c" 'langtool-correct-buffer)
+;; (defun langtool-autoshow-detail-popup (overlays)
+;;   (when (require 'popup nil t)
+;;     ;; Do not interrupt current popup
+;;     (unless (or popup-instances
+;;                 ;; suppress popup after type `C-g` .
+;;                 (memq last-command '(keyboard-quit)))
+;;       (let ((msg (langtool-details-error-message overlays)))
+;;         (popup-tip msg)))))
+;; (setq langtool-autoshow-message-function
+;;       'langtool-autoshow-detail-popup)
+;;---------------
+;;4 Grammarly
+;; (is-installed 'grammarly)
+;; (defun test-on-message (data)
+;;   "On message callback with DATA."
+;;   (message "[DATA] %s" data))
+;; ;; Set callback for receiving data.
+;; (add-to-list 'grammarly-on-message-function-list 'test-on-message)
+;; ;; Send check text request.
+;; (grammarly-check-text "Hello World")
+;;-------
+;;4.1 Grammarly
+(is-installed 'flycheck-grammarly)
+(with-eval-after-load 'flycheck
+  (flycheck-grammarly-setup))
+(setq flycheck-grammarly-check-time 0.8)
+;;------
 (custom-set-variables
  ;; custom-set-variables was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.
@@ -220,7 +260,7 @@
  '(custom-safe-themes
    '("613aedadd3b9e2554f39afe760708fc3285bf594f6447822dd29f947f0775d6c" "b0e446b48d03c5053af28908168262c3e5335dcad3317215d9fdeb8bac5bacf9" "e19ac4ef0f028f503b1ccafa7c337021834ce0d1a2bca03fcebc1ef635776bea" "d268b67e0935b9ebc427cad88ded41e875abfcc27abd409726a92e55459e0d01" "745d03d647c4b118f671c49214420639cb3af7152e81f132478ed1c649d4597d" "246a9596178bb806c5f41e5b571546bb6e0f4bd41a9da0df5dfbca7ec6e2250c" "4f1d2476c290eaa5d9ab9d13b60f2c0f1c8fa7703596fa91b235db7f99a9441b" default))
  '(package-selected-packages
-   '(org-bullets multiple-cursors ace-window ipython-shell-send ob-ipython elpy ditaa pyvenv anaconda-mode which-key use-package org-ref neotree markdown-mode doom-themes doom-modeline auctex))
+   '(flycheck-grammarly grammarly org-bullets multiple-cursors ace-window ipython-shell-send ob-ipython elpy ditaa pyvenv anaconda-mode which-key use-package org-ref neotree markdown-mode doom-themes doom-modeline auctex))
  '(safe-local-variable-values
    '((TeX-auto-save . t)
      (TeX-parse-self . t)