using it by myself

这句话有语法错误吗，好像没动词啊... 请详细点告诉我吧，最好是自己的经验
有主语了 但是没看见动词啊？？？？
我需要的是解决语法问题，而不是知道字面意思，字面意思我小学就知道 了， 这个问题是一只困扰我的细节难题

please answer it by english A driver should ______ his intention to turn by putting out his arm or by using his car indicator. they believed that by using computers the production of their factory____. until you learn it by heart是什么意思。。 Let us do it by ourselves,-----------? 求一首歌《let it rain》by：莎拉布莱曼 It is no using learning what you love but loving what you learn! “It is the standard protocol the Internet is using now”这句话有语法错误吗？ look at a picture and ask a question using "what"and then aswer it. We can’t solve problems by using the same kind of thinking we used when we created them.