present tense | |
I/you/we/they | call in |
he/she/it | calls in |
present participle | calling in |
past tense | called in |
past participle | called in |
It's a hot topic, and people have been calling in all morning. 这是个热门话题,整个上午都不断有人打来电话。
Al is at a conference this week, but he calls in every day.
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