At the moment the economic situation is very calm, because it’s situation, but we know from the past we’ve done a lot of work to force to this country a lot of German companies that are interested do start business, start even operating, investing, but we have to wait until everything is becoming calm.

1、為何這里是force to而不是force this country.....to do starte.....

2、that are interested是被動語態，還是interested僅僅只不過做表語？若是被動語態，表達的意思是不是應該是“得到大家有興趣的不少德國企業開始做業務，甚至開始運行投資.......?

1 a lot of German companies為force的賓語，本應在狀語to this country之前。但因為賓語帶了非常長的定語從句：that are interested to start business, start even operating, investing, 故賓語后移至狀語之后。這種現象稱為賓語后移。

2 that are interested to start...為系表結構。

be interested in doing sth: = want to do or have something.

be interested to do sth:= want to find out more about something.

be interested后接不定式作形容詞補足語時，不定式一般為hear/know/see/learn/find out等，意為想要知道更有有關某事的狀況。

本句中意為不少德國公司想要開辦公司，to start似應為in starting.