雅思常考基本语法有哪些？

2. 主谓宾句型：An Australian firm unveiled an electronic shark repellent unit.

3. 主谓双宾语句型：Such an arrangement will spare the CEOs a lot of time.

4. 主谓宾补句型：At the conference, the representatives from the developing countries tried to make their voice heard.

5. 主系表句型：I am proud of the people working in the after-sale department.