その提案には原則的には賛成します。の英語

I agree to the proposal in principle.

I am quite agreeable to the proposal.

I am in favor of the proposition.

I'm in favor of the proposition.

I oppose that suggestion.

I agree to your proposal.

I am by and large [in the main] in favor of the proposal.

He agreed to the plan in principle.

I agree to that proposal.

I approve the suggestion.

I'm all for her proposal.

I accept a proposal with reservation.

I accept the proposal, but with some reservations.

I agreed to the proposal.

We are favorable to the proposal.

favor a proposal

give countenance to the proposal

I do not accept that proposal.

I will deny that proposal.

I'm all for his suggestion.

I agreed to the proposal.

I cannot readily consent to the proposal.

I agree to this plan.

I'm for the bill.

I'll get everyone's consent for this proposal.

We consent to that proposal.

I will vote in favor of that bill.

I agree to his plan.

I'm quite agreeable to the plan.

I support the proposal.