I think it necessary to learn english well.同义句

I think it necessary to learn english well.同义句 I think that it is important to learn English well.(同义句转换) I think it is important to learn English well.的同义句 it's necessary for us to learn english well同义句 i find it easy to learn English well 同义句 It's necessary to learn English well. I think it difficult to learn English well句中为什么用it? I find it's difficult to learn English well.改同义句 I find it _ I think that it is important to learn English well .(改为简单句） 请问如何将'' I think it is hard to learn English well '改为否定句. 1、I found it very hard to learn English well.(同义句) I found _ 将“I find it is useful to learn English well"转换成同义句"I find --