I tried this and works fine:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
# Removes index.php from ExpressionEngine URLs
RewriteCond %{THE_REQUEST} ^GET.*index\.php [NC]
RewriteCond %{REQUEST_URI} !/system/.* [NC]
RewriteRule (.*?)index\.php/*(.*) /$1$2 [R=301,NE,L]
# Directs all EE web requests through the site index file
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /index.php/$1 [L]
</IfModule>
Exceptions
If your site’s system directory (/system/) has been renamed and is still accessible by URL, modify the RewriteCond line above:
RewriteCond %{REQUEST_URI} !/newdirectoryname/.* [NC]
If you are running EE from a sub-directory rather from the root of your domain (e.g. http://example.com/myeesite/ instead of http://example.com/), just remove the slash preceding index.php in the RewriteRule line above, like so:
RewriteRule ^(.*)$ index.php/$1 [L]
If you are running EE from a sub-directory and it still doesn’t work after removing the slash, you may need to specify the sub-directory in your rewrite rule. For example, if your sub-folder is named testing, change:
RewriteRule (.*?)index\.php/*(.*) /$1$2 [R=301,NE,L]
To:
RewriteRule (.*?)index\.php/*(.*) testing/$1$2 [R=301,NE,L]
And change:
RewriteRule ^(.*)$ /index.php/$1 [L]
To:
RewriteRule ^(.*)$ testing/index.php/$1 [L]
If your host requires forcing query strings, try adding a question mark following index.php in the RewriteRule line above, like so:
RewriteRule ^(.*)$ /index.php?/$1 [L]