英语：have trouble/problems/difficulty加动词ing还是to do还是done

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• let's about our problems.答案是not worry 但是不太明白 为什么不是do not worry还有learn后面是规定只能加不定式还是也可以加动词的-ing形式we can deal with our problems by thinking of something (bad)答案是填worse但是也不大明白希望大家详细地简介一下
• 还是一道高一英语题What should we do to prevent thoes accidents happening in the mines is (try to improve) the miners' working environment.为什么只能填try,不能加ing?不是在be动词后的嘛?疑问……
• 初一英语动词填空(一)Mary isn't old enough ___ (ride) a bicycleenough后面加什么?to do?Let's wait until the rain ___ (stop)stops?还是stopIt's too late .Millie ___ (have to ) go home quicklyDon't ___ (follow) me all teh time .I'm too busy是follow还是following?It's so cloudy.I think it ___ (rain)
• 英语中介词后面加doing的问题是介词后面紧跟的动词加ING还是介词后面的动词加ING例如after you and her do/doing,是哪个
• 英语：have trouble/problems/difficulty加动词ing还是to do还是done
• 如果在英语中,既有助动词do,又有like,动词是原型还是加ing?
• 提问,英语的一些单词、短语、句型用法1、We are all here waiting for Miss Green to come 为什么用to come2、I saw a big dog lying under the tree when walking past the shop为什么不用was walking3、All has been done now.We can go.这里为什么用has?是All为不定代词还是将All看为一个整体还是什么?4、The students were all tired,but none of them stopped to have a rest-Do you want an apple,a banana or a pear?-None,they all look bad为什么用none,不是人和物吗?5、I think he must be in the office now,isn't he?是否情态动词反意疑问句都用be动词?
• What we need to do is 后跟 "What we need to do is verify their nuclear declaration and we have put together a protocol that's based on international standards," Hill told reporters late Friday."I think there's a lot of support within the six-party process for getting this done."系动词 is 后面似乎应该跟ing 或 to,但凭直觉似乎原型很合适.谁能解释一下这里为什么用原型?省略了to的不定式还是什么?省略了to吗？为什么要省？语法上怎么解释？
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