意志動詞 (建議、命令、要求、堅持)後面的子句 動詞省略should 後接原形動詞

意志動詞 (建議、命令、要求、堅持)後面的子句的動詞省略should 後接原形動詞

S	建議: advise, suggest, propose (提議), recommend (推薦)	that +S + (should) VR that +S + (should) not VR
	命令: command, order
	要求: require, request, demand, ask
	堅持: insist, persist,urge (力勸), maintain (主張), advocate

Reference: 

1. https://thinkhouse.weebly.com/english-classroom/7

2. https://blog.xuite.net/chen311/twblog/141570937-%E8%8B%B1%E6%96%87%E6%96%87%E6%B3%95+%E2%98%86%E5%BB%BA%E8%AD%B0%E5%BC%8F%E5%8F%A5%E5%9E%8B

3. https://www.hopenglish.com/why-do-we-use-a-base-verb-after-suggest

4.https://www.nani.com.tw/slearn/sleng/eng_d/Chapter04/Chapter04_6.htm