d) "be" / there + "be"

# Also see II-A-5-b-1)-d): there + "be" (simple present tense) 

The Verb "Be" - Present and Past Tense
source: LearnAmericanEnglishOnline   2008-09-19
"be" in the past tense    2008-02-15
"Be" -- Past Tense Questions and Answers
Using "be" and "do" in the past tense

Using "to be" to describe your life
source: Learn English with Rebecca 2012年11月2日
quiz: http://www.engvid.com/use-to-be-to-de...

How to Use WAS and WERE (Basic English Grammar) 
source: Learn English with Rebecca          2018年3月12日

TO BE verb
source: EnglishLessons4U     2011年12月21日
quiz: http://www.engvid.com/basic-english-g...

"Was" and "Were"
source: EnglishLessons4U      2011年7月18日
quiz: http://www.engvid.com/was-were/#quiz!

Was, Were - Confusion English
source: Twominute English     2013年5月2日