第一段:hope应改为hoping,因为前面的句子已经是完整的句子了,应用现在分词作状语。
第二段:i am free 应用将来时,还未发生,还不确定,改为i will be free or i might be free.
第三段:1.convenice为名词,这里谓语为are,宾语应用形容词,所以改为you are convenient.
2.to let me kown中的to应删去,这里是祈使句句型,直接用动词原型即可.
第四段:if you had already selected中应改为have,回顾通篇时态为现在时,而had表过去
扩展资料:
①祈使句句型:动词原型开头,省略主语,也可加上please+动词原型。
②现在完成时和过去完成时的区别
现在完成时
构成:have /has +done/been done
用法:
1动作发生在过去对现在的影响
eg:The possibility has been dismissed that he has liver failure.
2 动作开始于过去,一直持续到现在
eg:How long have you lived here?
3在时间条件壮语从句中,用现在完成时替代将来完成时
eg:When you have finished the magazine,please lend it to me.
过去完成时
构成:had + done/been done
由时间状语来判定,与过去完成时连用的时间状语有:
1. by + 过去的时间点。如: I had finished reading the novel by nine o'clock last night.
2. by the end of + 过去的时间点。如: We had learned over two thousand English words by the end of last term.
3. before + 过去的时间点。如: They had planted six hundred trees before last Wednesday
③现在分词做状语
现在分词短语可以用作状语,修饰句子中由谓语表示的主要动作。这个状语可以表示动作发生的时间、原因、结果、条件、方式或表示主要动作发生的伴随情况,通常相当于一个状语从句或并列分句
1, Our orders decreased.
2, Our orders to xxx is less than before.
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