After you have grated the cheese, add it to the mixture
و این که از قرار معلوم future time clause بعد از conjunction های زمانی باید present باشن. حالا یا simple present یا present perfect. این درسته استاد؟ فرق معنایی بین After you have grated the cheese, add it to the mixture. و After you grated the cheese, add it to the mixture. چی هست؟