三人行，必有我师(焉)

语法
了, for past tense in some cases and approximately one million other things (it cracks me up that MandarinBean has a page just called 了 when, as below, CGW has 31, count them, 31 pages on the topic)
https://mandarinbean.com/le/
https://resources.allsetlearning.com/chinese/grammar/%E4%BA%86

词汇
程度, degree (as in "extent"); 工程师, engineer; 过程, process; 课程, curriculum ( ”pinyin” )
https://mandarinbean.com/new-hsk-3-word-list/

Guardian:
前天吃了火锅，昨天和朋友喝了两顿大酒，今天还没吃但喝了一下午的茶, day before yesterday I ate hotpot, yesterday I drank a lot with a friend, today I haven't eaten yet but I had some afternoon tea
我快要迟到了, I'm about to be late
变异的途径和程度是多种多样的, the route and process of mutation are highly diverse

Me:
我昨天去了神户跟朋友喝杯茶了。
问题的程度还不清楚。